Don't waste your time emailing them for support. You will get nothing. No help at all.
I only asked for a diagram of their recommended way to connect the gauge and each reply I got was "labeled above the terminals" Really, Oh gee I didn't see the labels above the terminals. What a crap reply. I just want their recommendation on the wiring maybe send me a PDF. I GOT NOTHING. One last try I asked. Can you tell me! Do I connect all the terminals or just the ones I feel that is needed? REPLY: The pinout for the gauge is embossed on the backside of the unit. I am only asking something REALLY simple and get short BS replies. This is where I gave up. I have you try finding my answer online from others who have installed the same unit. Hopeless.