Not that difficult to see the pump by getting down and squinting in front of the right-rear tyre ...
But getting at everything is another matter, the electrics end particularly, which is concealed within the frame-work for the right-hand battery. The mounting stud shown is the lower one, there is another above the pump and slightly rearward of this one.
A large purpose-moulded grommet (unfortunately NLA) is pushed into a large hole in the front wall of the boot and the panel edge located in a groove in the grommet. The pump body is pushed into the grommet from under the car. The pump is orientated so that its unions are pointing towards the middle of the car. An earth/ground wire comes from the rear harness and attaches to a spade on the pump body near the unions. Also under the car a short length of plastic tubing connects the diaphragm vent nipple on the pump body to the end of a washer 'Tee' sticking through a plain grommet also in the rear wall of the boot. The steel braided fuel supply pipe from the tank connects to the lower pump union, and another feeding the carbs connects to the upper union.
A large worm-clip is fitted around the grommet clamping onto the pump body, which together with the panel edge in the groove of the grommet seals against water entry. The 12v supply wire is connected to the pump terminal. A short length of plastic tubing connects to the vent port on the end-cap and hangs downwards (prevents any debris or water dropping into the upward-pointing port).
A metal box screws to the boot front wall to protect the pump and wiring from damage from heavy objects in the boot. The arms of the vent 'Tee' are left unconnected and pointing horizontally. Note the new brown wire added by a PO when the pump obviously shorted and burnt out the original white wire in the rear harness, the vestiges can be seen where the harness enters the boot. Fortunately the rest of the wires in the harness weren't damaged enough to warrant replacement of the complete harness, nor the main harness which also suffered some damage. See 'Pump Fusing' on the main page to protect against the possibility of this on your car.
The vent pipes in the boot of a Mk2 roadster. For some reason one terminates on the shelf and the other is brought up to above the chassis rail. (Photo from Clausager until I can get one from my roadster)
My 75 V8, however Clausager doesn't appear show a vent in this position on the 75 V8 on page 29.