Cable harness tailgate B4 Avant

Hello, I’m constantly getting out the fuse for the fog lamp. I think that’s on the wire harness because they’re totally brittle and look out.. Has someone experienced such repair kits from ebayhttp://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=260333319922 orhttp://cgi.ebay.de/…566QQcmdZViewItemQQptZAuto parts_ Zubeh%C3%B6r?… orhttp://cgi.ebay.de/…896QQcmdZViewItemQQptZAuto parts_ Zubeh%C3%B6r?… How best to get to the cables. ng. MfG