So I bought a later model replacement pas pump.

Began the process of swapping them over...

Got to the bit with the connections of the pipe to the reservoir
and it doesn't fit?! The adapter is too big for the hole on the side of the reservoir!

Is it worth just buying another that has the adapter on the side of the reservoir already?

Mine is a 95 import and the adapter is a green colour once getting the muc off.

Any advice is much appreciated!