Tow Bar Wiring Kits

[S1LKY]

Hi, I have a couple of questions regarding vehicle specific tow bar wiring kits hopefully someone can help shed some light on.

I've just fitted the tow bar to a 2004 t25 hatchback and about to start the electrical side. I've seen on an auction website a couple of kits, first one is £16 but states in bold letters "saloon model only". After phoning the company they have a kit for the hatchback but it's £88. So first question is what is the major difference between the saloon and hatchback rear lights that warrants £72 difference?

I've also found another kit from Germany for the hatchback at £32 but again in bold letters "left hand drive only". So question 2, I appreciate our Continental friends have the fog lights on the opposite side of the car to us Brits but if I was to drive to Europe and hire a trailer isn't the plug ISO ie a European standard so what again is the difference in wiring?.

Hopefully someone can help me out in this mission. Thanks in advance.