I bought a n2 that was previously modded on the bottom. they took it off before they sold it to me, now i cleaned it up with rubbing alcohol, and I don't see any pins that are mentioned everywhere. tried droppin solder, but wont stick. there appears to be a cutout in the green board and a number is left right under it. its all brass looking in the cutout, any ideas how i can get this thing to work again?