I just got done building one for a EMT teacher thats retired. the wires plug in to a block. move them around tell you got it to where you want .. but when you first turn it on,(BUMMER) you will need to use the plug to change. once its set it will stay until you turn it off. the other way to wire it is to use a jr plug wire it in sequence and hook it up to the break side of the receiver to get break lights or your steering for when you turn and it goes to that side of the way you plug it in. just mess around tell you get it where you want it wont hurt to change any wires in the block. hope this helps,, this is it just without the lights
I shot a home video and posted it on u tube with the light flashing, if you want the link I will pm it to you just pm me and ask