Might I ask why you are trying to put a wii into a wii mini? More curious than anything...
It looks like they took the drive board of a normal Wii disc drive and hooked it up to the Mini drive, but that wouldn't work because it would never detect a disc in the drive, and would always try to eject or pull in a disc into it's nonexistent slot. That modchip looks like one of the ones that lets you play burned dvd games.