Here's the best I can do. This image is NOT official as far as I know, and may not in fact be the real product. It is showing up on a website that seems to have leaked images early and they will be a reseller apparently.
Notice that the larger quicksolder points seems to be in the same configuration as the power/ground points on the drive. To me this makes me think it is a drive chip. I see potentially two more quicksolder points, although there could be as many as 4 more quicksolder points. I can't completely reconcile the picture above with this mock-up which we're all familiar with:
In either case, the other quicksolder points don't seem to conform to the serial ports on the DVD drive, so my guess is that this is NOT a drive hack like the Wiinja or Cyclowiz.
It does seem that 4 wires are necessary. Someone said that maybe the wires are to be run to the mainboard while the chip itself resides on the drive. That would certainly open the console up to things like (J) and (U) playing on the same console. They could all just go to the drive. I know I would find it to be a pain in the ass to have to get all the way to the mainboard and even feed wires to it from the drive board, probably running parallel to the drive cable that resembles an IDE cable.
This is all conjecture, but maybe I've turned some proverbial light bulbs on.