well I won't try the farting if the receptionist is fit
new battery lead arrived so its on, looks like I was wrong about the old one, it isn't two joined together, it is one but a large section of the plastic insulation has melted and been covered with masking tape, cable is also quite frayed there. I guess it must have been touching the engine sometime.
Have to say I am not wholly enamoured by the way the cable has to route round the engine to get to the starter. Considering moving it to under the passenger seat. The 110 I had years ago had the battery there and it was quite a big one, but the box under the passenger seat in the s3 doesn't look as big, could be just my memory. anyway that is a job for much later.
Re-routed the ignition wires to come out the passenger side of the bulkhead as that is where the starter is. Also re-routed the washer bottle wire so it follows the wiper wires and also comes out the passenger side. Seemed silly to have all but one of the wires from one switch going one way and the last one going the other on a long and tortuous journey.
Will tidy the wiring with some conduit too.
New fuse boxes are here, made a positive bus for the ignition on items and will have one item on one fuse, makes it so much easier to understand than multiple wires on one terminal which is the current set up. Will make a bus for the other 3 prongs for items like the horn which I don't want only on when the ignition is on.