1980 printed circuit w/tach

[Tony_W]

Hey guys, long time reader but just finally joined.

Have a 1980 c10 2wd. I installed a new harness from speedway.

I'm having trouble indentifying on the printed circuit the tabs for Ground/hot/signal.

Purchased a new wiring harness from speedway and so far so good. I purchased new back bezel from LMC that has the tach spot in place of the big old gas guage and I picked up a printed circuit from them also with tach. I picked up the speed guage and the small gas guage.

LMC has the small gas guage marked for signal/ground/hot but going from there I'm not confident. I don't want to toast anything so I have been looking for something that shows Hot/ground and signal. This factory blue wire or orange wire does not work for me since I'm using the speedway harness.

Anyone know of a layout pic of the printed circuit that I can see that shows all the guages and lights on a 1980 printed circuit with tach ground, hot, signal?

Appreciate any feed back, until then I'm stuck on my project.