Just found some pics and it jogged the memory,

From the battery then it goes through the grommet on the bulk head.

Then under the carpet along the sill to the boot area

Then it goes through the original grommet which is on the flat part of the boot floor near to were the jack is.

Then you loop it underneath and up through the original grommet in the spare wheel well next to the inertia switch, connect it all up to the new relay and then run the feed back out the same grommet to the pump,

all a bit long winded I know but it might help someone