It's more likely to be me that's being thick.
I would imagine that the old push-pump is removed and a switch fitted to that hole for the electric pump.
Then the two tubes removed from the push-pump would be joined together, right?
I would have already cut the tube near to the bottle and located the electrical pump there, with one end of my newly-cut tube going to the bottle and the other end disappears through the bulkhead up to the washer jets....am I making sense?
