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Tow hitch 13 pin EURO style to standard 7 pin adaptor

I cannot recommend one but I think you will want one on a flexible lead as the 13 pin socket faces down, so by time you add an adaptor, the cable is going to be hanging very low.
I used my tow hitch at the weekend, complete with a cheap 13 to 7 pin adapter. It worked fine. It's not too low, but it is further forward and offset to the left more than on most hitches, so it's possible that your cable will be a little short - mine was.