I'm rewiring the dash controls and gauges on my '97 Bass Tracker TX-17. There's a five wire connector that runs from under the dash to the ignition box: black, grey, brown w/white line, purple, and tan w/blue line. The grey is the hot and the black is ground which leaves the other three. I believe they are for the tach and speedometer. Can anyone verify this and tell me which one goes where?