Hey guys i took my whole gauge apart... now i need to know how to connect the red(12v) wire and the black wire... it says i need to connect the black wire to a good ground... where do i connect the red and the black.. where do i find a good ground... i know that u need to splice the wires... how do i do this??? please help me, ived had these gauges for about 3 weeks now... i want to install them... but i need help..