Notes on fitting in lieu of proper instructions:
1, most of the fitting is done by touch with the glovebox in the car, since once you put a hand or two in there you can't see anything! Push the glovebox a little back from fully open to get a bit more room.
2, the wires in the glovebox are not polarised like everywhere else on the car so you may have to swap the wires on the new light around. They will work one way and not the other. Remember to turn the sidelights on
3, once you get the right connection, the clear rubber boot on the new light slips over the original black-sleeved terminal. It helps to twist it between finger and thumb to almost screw it over the black sleeving. You're aiming for a fully insulated connection as this will live in the void over the glovebox
4, once the connections and boots are all in place, push the rear tab of the new light in to its slot (this might need a wiggle), then feed the wire up through the hole, and push the front tab of the light up in to place. It will click in and stay put.
I'll put some pics up in a bit.