reverse lights not working Options

[jinks_one]

iv got a 1994 st204 automatic my reverse lights are not working, i checked globes, fuses, checked wiring back half way inside the car.
iv had a look at the reverse switch on the gearbox. but im unsure which plug is the reverse switch. i believe its the 2 wire plug next to the linkages.
i have tried bridging the wires on the two pin plug (next to linkages) and reverse lights still dont work. i may have the wrong plug.
also does anyone have a electrical wiring diagram for this model.
thanks