Ok 1st.. question in the engine bay fuse box, should there be a fuse
in the ABS slot?

As Kevin said "No ABS installed".

2nd.. Theres a white plug under the drivers seat unattached, any
ideas.It appears to come from the seat, not sure.

This is connected to the instrument panel and is the seat belt warning
light


3rd.. how do you remove the cap on the brake fluid reserve?

Yes, it unscrews - but is usually VERY tight


4th.. fuel gauge is now registering even when ignition is off, I
removed the fuse in the fusebox under the dash to see if that could
resolve it but it didnt. This is a problem I'd like to get resolved of
course. As I still havent had a chance of finding out what fuel
economy I'm getting.

The wiring to the fuel system is constant. I have the same thing with
my Lancer and my Mazda.


5th.. is there a works manual available?

I've been unable to get one - even through a couple of friends in
Malaysia.
I think most of us get by with the Electrics that Neil has scouted
down for us and the CC Lancer manual.

John