Thanks for the speedy reply :) So just to double check, I can scrape off the black coating on a contact part that isn't under the rubber buttons (on DMG), solder a wire, then connect one to the corresponding button on the GBASP and the other wire to the GBASP ground. So Ill end up with 8 ground...
Where do I solder the wires exactly off the DMG board if I want to use the DMG buttons instead of something else? I'm struggling to decide what to connect to where.