Sorry for the double post, but I think I understand part of what I was asking earlier.
So in ShockSlayers diagram, when the switch is in the down position it will be powered off wall power, and when it is in the up position it is running off the batteries. This lets you play and charge your batteries at the same time. I'm still not sure where the 7.2v AC adapter wire goes to though from the switch... do you connect it to the main power line? Bud said on another thread that I found "In that diagram where it says "7.2v AC" that's where you connect the positive pole of the power jack to the switch." butttt isn't that what the pin directly left of this is for? I think i'm just confusing myself by thinking too hard...
Anyway, so I also found this diagram by Life of Brian when searching around old threads:
Now the wiring is slightly different in this picture, and what I gather from it (and please correct me if I'm wrong) is that in the down position you are charging your batteries but you cannot play. In the up position you are running the system off your batteries.
Any input on this would help a lot, so thanks for your two cents!
Edit: Here's the link to the topic I quoted Bud from: viewtopic.php?f=36&t=9165
and here is the link to where I found LoB's diagram: viewtopic.php?f=36&t=1469
that search function on here is quite handy