If that red wire is soldered to that screwhole.... then it's a ground. If it wraps underneath the motherboard and goes back over toward the pinheader...its probably your d0 wire that has been soldered to the underside d0. If it is in fact the d0...the person who did it should be shot
(d0 wires should be as short as possible) Looking at the pic of the chameleon's solder side, it looks as though a wire ripped off the d0 solder pad.
I'd pull the board out, check to make sure that red wire routes back toward the pinheader and the underside d0, if so, all you should need to do is resolder the wire onto the d0 pad of the chameleon.
You can look at a pic of the topside and underside d0 points in This teamxodus iceguide
. Yes its a guide for the xenium, but it shows the d0 points on page 14 & 15 (underside is on 15)