This is probably stupid but I’ve spend loads of time googling and searching and can’t find a walk through just lots of issues around bad accumulators.

I can get at this from behind but is gas going to leak all over and drain the tank? How to prevent that? Please share some tips on how best to replace these and the pump and filter for that matter.

Any tips would be greatly appreciated and while I am there I may just replace the pump too although the accumulator looks simpler so I may just do that- unless of course I bathe myself in gasoline accidentally.