Removing wires from turn signal connectors

Hi all,

Just finished installing the 12oclocklabs DRC Tail Light board... https://www.youtube.com/watch?feature=player_embedded&v=rc6MOFcHw9U

I have a quick question. The tail light now integrates the turn signal power wires into the harness and all wires now use the same ground. I'd like to remove the ground wires from each of the two 3-wire connectors and am having a hard time trying to figure these out. I've poked and prodded with needles and a jeweler's screw driver to no avail.

Any suggestions? Thanks!