On the end of your wiring loom you should have these plugs
75/ZT /MkI/MkII it is a factory standard.
The 6 pin plug should look like this from above
They plug into these sockets
75/ZT /MkI/MkII, they All start ALL PCB's from a 75/ZT and Land Rover Freelander ,when the engine is started and the ambient temp is 5
°C
If the PCB originated from a BMW, Range Rover L322, etc, although identical, it will NOT start. Even if you do say Messiah.