Speedcal help...

Im installing my speedcal after 3.73 install. I just need to know from any of you what cable color is the ground from the VSS cables? It says that is supposed to be the gray/red. I just need to know from the horses mouth which one is exactly, on a 2002 5 Speed GT. I left my voltmeter at work .

Any help will be greatly appreciated.

Thx man...I tried and it worked yesterday...these gears are kinda fun...anyways thx for your reply...