pv1092

Hi, I have mounted a tow bar to my Octavia. I have also bought a generic 13-pin socket to the tow bar. To supply the the socket on the tow bar I have draw the supply wire to the fuse box under the steering wheel. How do I connect the supply in the easiest way? There is separate fuses for the tow bar socket so I only need to connect directly on the battery. The new cables are not shown in the photo.