The reversing light switch connector is on the nearside above the driveshaft, but the switch itself is on the top of the gearbox on the offside, (the wiring loops over the top of the gearbox). the switch is a large diameter approx 3", black plastic topped and is quite difficult to remove.
It can be levered mine out with a flat bladed screwdriver. note the orientation when fitted as it needs to go back in the same position.
The switch is not adjustable and is accessed from above down the back of the engine.
ChicksFan, September 2009