@Richard,
Sorry I didn't see your reply,
That fuse addition is a strange thing I have never come across one and I'm pleased.
Because of this I belled it out as you cant see which way round the second slot is tapped from.
And as you suggest that wouldn't make an independent circuit.
Very good point.
As for the instructions, I thought they were pretty good, as simple as it looks its not easy to draft up something like that.
I found them pretty spot on, my switch was position #3 and I think they all are but I think it would work the same from other pins because they are 12v perm too.
The Install with plenty of room (unlike me) is a comfortable 2.5 hrs.
If I did it at my work where there's lots of space and plenty of light, I reckon under an hour (now that I know the run).
The grommet was as Jake's instruction for the 986 behind the passenger (UK) seat.
Don't panic and use draw wires would the advice I can think of. I used a draw wire from the rear of the passenger seat to the wheel arch and that was it the rest was just tucked under the console.
Sorry if this is badly written, I thought it was so much more fun to stay on the train to Margate than get off it and go to School.Doh!.