I have 5 fuses at the console and looking at them the tops (lying on back looking up) of all 5 are connected together. Now 2 of the 5 have no connectors on the bottoms of them and i am wondering can i hook to 1 of them for power for my gps? and run my front graph to the other (battery interference).And if i can where does the ground wire to the gps hook 2? Seperate from that is a 1 inch by 3 inch plastic plate with terminals on it with 3 or 4 openings on it -would this be power also or maybe the grounds????? I would rather not run wire to battery for gps if i dont have to.Thanks for any and all help CRAZY

Yes, you can use the two empty connectors for other equipment.  Just make sure that the fuses are of the amperage rating recommended by the equipment manufacturer.  As for the ground wires (the black ones) there is usually a "fixture" located adjacent to the fuses where the these wires also connect.  Look for the black wires.