Basically got a genuine used replacement cat for my mk3 project but its was off an earlier model and the lambda has a square connector with an external earth and my original is an oval connector which I assume is earthed into the loom. Just really need to know if they can be changed and if someone knows what wires go where.
P.s - My original lambda is seized in my knackered cat so can just swap them over.
The image shows my original on the left and my replacement on the right.

I'm hoping i can just cut and solder the wires in their same locations.
Any help will be greatly appreciated. Thanks.