Well, I put off buying a manual simply because it's not my machine, figure they could get one if they want it.
But......
Finally got a hold of someone at Bromley that could help and they sent me some information and after looking at the machine again with that info it all made sense.
There are two switches that are either turned on or off depending on which plastic payout pieces is in place. It's the plastic shield that sits right in front of the pins and also has the numbers on it. (100, 10, 15, 50, etc) There's four to choose from, different ones have slots in the plastic sheet on either end that tell the switch to be OFF, if there is no slot the switch will be held ON.
So a combination of left switch on or off, right switch on or off, both switches on or both switches off will determine the payout option. (basically a maximum payout per game is what it boiled down to actually)
Anyways...
I'll attach what they sent me if for whatever reason someone else is looking for it.
Cheers