Morning , I’m due to take delivery of the WildaX constellation 3XL. I believe it has an under slung spare wheel and would like to put a wheel lock on like I used to have on my Citroen Picasso. Looking at Protect a Van I see they sell locks but concerned if they need drilling into the floor . In the past I have used locks ? for underslung wheels .any advice would be welcome. Dealers say that internal Heos locks can’t be fitted due to cab blinds . Van is on a Citroen’s chassis any, thoughts welcome .