1973 chev reg cab dually guage wiring help

[skidlid]

Hi guys im new to the forum, I need to know what the 3 prong connections for the fuel guage and the engine temp are, looking at the prongs in the dash not the gauges, I want to wire the gauges direct I have a problem with the ribbon cable
so if someone can explain each of the 3 prongs for those 2 gauges and then I can wire the gauges direct,
thx for any help much appreciated

[mongocanfly]

maybe thisll help...if not google wiring diagrams for your truck..http://www.73-87chevytrucks.com/tech...instrument.jpg