BTW, just a little more info about what's going on.
I've had this Area 51 Site 4 cab for years now I bought it from a Laundramat owner after seeing it sitting in the back of the place for over six months.
I went to ask about it when I first saw it but he refused to sell it, like 6 months later in the middle of December when it had been sitting out in the weather and now covered in snow I went back and told him I'll get you $100 take it or leave it!
I went back with a buddy and took it about an hour later.
I got the game back up and running but the cab is obviously waterlogged and beyond help.
Although I got the game up and running the picture was far from good so I messed with the monitor. (HUGE mistake)
I later realized that the main issue with the picture was corrosion built up in the signal connector to the monitor, once disconnected and reconnected the picture improved 100% but by that time I F'd with so much on the monitor the picture was not like I should be!

Anyway, I believe I am correct that it is a Wells Gardner K7400 original to the dedicated cab.
And as I said I have been messing with this for some time but never really got anywhere so just forgot about it for years at a time!
Then recently I got an email from ebay telling me that there was a USB2GUN JAMMA board on auction, I bought it for $160 because why not it's only the second time I have ever seen one on ebay, I bought the first NON-JAMMA one too! (Don't hate me!)

I also own a Sharpshooter cab it's actually a Dynamo cab that is in great shape but has an older monitor, still a great looking (probably looks better than this one) but the plan is to use the WG K4700 after a cap kit and a bit of love. The Sharpshooter cab has some weird guns that I never heard of but I only paid $300 for it so whatever.
I have 4 Happ guns two on the Area51 and two I bought for parts.
So obviously this is about making a MAME cab that uses real Arcade guns.
I kept putting it on pause because I could never get to this point, but now I am here!
Currently, I am running a Lenovo M83 Tower maxed out the only thing was they supposedly had a white list for video cards so I wasn't sure if the one I got (AMD Radeon R7 350X) would even work but it did with no problem so I'm not sure if the whole Lenovo white list video card thing is BS or if I just got lucky? After that I have my VGA connected to the USB2GUN and then to an Ultimarc Video amplifier and up until tonight I wasn't sure if I was just chasing a dream but when I launched the game from command prompt the picture came up and it's only a few tweaks from PERFECT!!!! Like OMG!
It honestly looks better than if I disconnect it from the PC and put it back on the Area 51 board!!!
Anyway, I apologize for going on and on.
I'm on a Euphoric and a tad bit drunk HIGH, I have been wanting to get this far for literally years!
Now I honestly feel like I can actually take the next step to connect the guns to the USB2GUN board and give them a go.
BTW, Both USB2GUN board work fine they are recognized by windows and show up as a game controllers.
I have never played with them other than now also having them as a VGA pass through, I am surprised that the USB2GUN doesn't do the video amp Like The Ultimarc amp does but obviously it doesn't because I measured it before doing the required mod to the Ultimarc.
I actually have some test programs that were used for the Optigun so those should work since it's the same beast!
Anyway enough from me for tonight, if anyone knows what is causing the switchres issue in windows let me know!!!
Also, I am NOT Hoarding USB2GUN boards, I figured buy another since you don't know if the one you have works, I will NOT buy another and I may just sell one for around the same price I bought it.