How to connect generator / rv fuel pump

On RockAuto, you can select Fuel Tank and there are a couple pictures. From them, it looks like you have to be able to see the top of the tank to see the top of the Module, where the connections are. If there's space above the tank, you might be able to see, or get a mirror in there, or maybe a camera or phone and get a photo of it. Otherwise, tank would have to come down. Some owners have cut a hole in the floor of the coach body to access the pump and made an access hatch cover to close it up. I really don't recommend that because I'm not sure I'd miss the welded steel frame under the floor and above the metal plate on the bottom. It'd suck to ruin the floor and still not be able to get to the pump module area of the tank.