Thanks mj I think I got it, and backwoodsboy I have eliminated the front and I put a bigger one in the bed with a sending unit in it and I'm gonna run the wires to that tank so I can still have my fuel gauge
Actually there's four ,two are heavier , red/gray , black. Two are lighter ,yellow/gray. Gray/red when I touched the two smaller ones together gauge when to E otherwise gauge is peg way past full