Does anyone know where to get (preferably in UK) or part number for the bits needed to add an extra high power fuse link on the outside front of a Tiguan fuse box (think same box is used in many VW-Skoda etc).

I'd like to add a high current feed for caravan fridge/inverter and would like to do it properly. Seems there are spare blank slots in the front busbar on the fusebox, but need the metal insert post to allow a new fuse link to be fitted:



I guess I could fudge it with little bits of metal and bolts, but I'd rather do it tidily and safely so it looks factory fitted. Any help appreciated.

Also any recommendations on best route for a thick cable in protective tubing to run to the boot/trunk area?

Alex