Try to.more pics with phone

this cap will be on when traveling

same cap goes on filler to block it
Used same water hose no need to cut it just pushed it through floor and ran it to tap the same fitting on the inside of van on the filler now goes on tap it was all so easy and so much better
The saddles i used to clamp tap on are 20mm nylon coated i put 4 or 5 clamps on for it to very strong stainless steel bolts and lock nuts both m5 size best and easyest mod ive eva done should had done it 2 years ago