I got a deal on two 2 1/16" guages. They're made by Iequus. One is water temperature and the other is oil pressure. I had planned on mounting them underneath my radio in a bezel that was included with them. They both have the equipment needed to hook them up but no instructions. Can someone help me with where i should hook these up at on my motor? Would it be a better idea to scrap these for some electric gauges?