I bought the tow equipe one from ebay.
it truly is dog easy, did mine in about an hour, it's only 6 bolts, no drilling or nuffink, all the threaded holes are already there, there's even a push out grommet to pass the wiring through the body. if you buy the right wiring kit, it will have a plug to connect to the vehicle wiring, if not, easily splices into the loom behind the drivers side boot panel using your chosen method of connection (solder, splice or crimp)
sadly you is in scotland, or I'd offer to come and help you.