'92 SCR access to shower drain pump and fresh water pump

[Duffy]

I have 1992 2300 SCR. I need to do work on both shower drain pump and fresh water pump. I know their location but access is extremely tight. They are located on starboard side just below head. There is small access door, only about 12"x14", in aft berth. It's almost impossible to reach drain pump through this door. Fresh water pump a little easier. I'm actually thinking about cutting larger access door so future repairs would be easier. Anyone have any idea how better to get to these two items?? Thanks for the assist.