Quick fix,
Buy length of trailer lead.
Buy 1 x socket of type you want.
Buy 1 x plug for vehicle.
Buy 2 x bulb sockets & 2 x bulbs. (these can be a combinted fitting which can easily be strapped to the a-frame when in use.
I just assembled on piece of wood and plug in to vehicle.
I also have various sockets for the different trailers I pull along behind.
Makes it easy to borrow etc....

