[mickmate]

There should only be two holes in the top cover. One is the filler cap in the corner, the other is the tube fitting in the center. The caps can be turned around but I think you'll find it a trick to fill with the cap against the firewall under the bonnet latch bracket. I believe also the Cobra bottle bracket should be two holes only rather than the universal multi holed and slotted type. There was a generic aftermarket kit of this washer set up (multi holed) and there was also manufacturers applications whether it was Land Rover or Austin A10 or some early Brit motah.