they are specific to each side
one is for the hangle and the other is for the assembly
the facelift 90 spec cars had integral locks and things that were cable operated and the ealier cars had rods
it's all a bit complciated and i've had a bit of the old falling down water but if i remember i'll try to make some sense later today
the door chell has osme changes so you may need ot adjust it with a hammer to make the newr locks fit the older car but it's all about making them more secure and leass easy to break into with a stick