Thanks for the confirmation.

I was going to use a scotch connector, but when buying the bits and pieces from the auto electric place the chap there advised that it would be a better connection if it was soldered rather than using a link connectors.

It will be taped up afterwards, if it ever needs to come out I suppose it only needs to be heated to release the connection and then re-taped.

This is how I've got the relay set up at the moment.

- 30: positive battery terminal
- 85: cable from tail light
- 86: earth (or negative battery terminal)
- 87: Fuse box