The board looks OK, Different but OK. I suspect this mod was applied so that it could be undone, returning the ssc to V1 condition, should there be a change.
Recheck the cat 5 pigtail, looks like yellow wires in the picture, may not be the right pin out. Also check the resistor, hidden in the shrink wrap. Should be 220 - 330 ohms.
If the ssc still doesn't work, Try moving the blue data wire back to its original location and flash it with V1 firmware. I have had an accident with one of my V3 modded ssc where the 12volt and data lines shorted, blowing the output pin on the pic chip, The chip still worked as a V1. You might also want to check for this.