Replacing trailer plug after dog ate it off boat. Bought 5flat plug but now noticed 6 wires on old plug….assume one is a ground but dont know if i need to double up one or leave it out. new one is blue, green, yellow, brown, white; boat is blue, green, yellow, brown ,green/brown, white. What is the green/brown for and what do i do with it going to a 5??
.
