Fuel pump not sliding into tank

I am replacing the fuel pumps on an Equinox that has one fuel pump on each side of the tank. The tank has, what I would best describe as a thin plastic ring/lip that the od of the pump slides into. I already broke the secondary pump cap trying to get it in, so I am trying a second one and don’t want to break it. Any ideas on how to make this easier?

How did old pumps come out? They are identical?

I found that 2010 through 2017 Equinoxes used two fuel pumps, one in the tank and the other mounted to the engine so as often happens I’m very confused. A side by side photo comparison of the new and old pumps would help.And also a photo of the inside of the tank and what I guess is a baffle.