Uh, I think you're headed in the wrong direction. Take a close look at the picture. What you have is a 4 wire trailer harness. By 4 wire I mean you have a left stop/turn, right stop/turn, tail, and ground. The yellow and green are the stop/turn wires, the brown are tail, and the white ground. You will need a 5 to 4 wire converter for you BB harness because the Spyder has left turn, right turn, stop, tail, and ground. Stop is brake. Then you can just use a 6 wire connector but only use 4 of the wires. Or better yet, cut off the 6 wire connector and splice in a flat 4 wire connector.