I have tried looking to find out some information on the minipac but to no avail. So I was hoping some of you might be able to help me

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I bought a minipac, and wired it up. But I could not get any response to be sent to the PC. It detects everything just fine but no key presses are sent.
I believe my problem comes from the ground wires. I am very confused on how those are supposed to be hooked up. I daisy chained them across all of the common leads on the joysticks and buttons but I'm not sure how to "ground" it.
There is a prong that can be slipped into a connector that kind of makes the ground daisy-chain a complete circuit, but I don't know if that is the correct thing to do. There are probably 5 or so of the connectors on the ground daisy chain that are not in use. Is that possibly causing problems?
Sorry if this question has been asked somewhere and I couldn't find it. Sadly my CD that was supposed to come with the instructions/utilities for the minipac came cracked, so I can't see if there were any minipac specific instructions on that disc. Any help would be greatly appreciated.