how did you mount your bike side plug? i need a 6 wire plug as my trailer has trailer brakes. currently on the bike is a 6 wire plug coming through a hole drilled in back fender, it is rectangle with two rows of pins 1 is female, the trailer has same style yet another brand and the opposite pin is on the wrong corner. i have purchased a round 6 pin set and have seen some mounted in back fender, on hitch and under trunk. any suggestions?