My friends turbo

Where is the fuse box located on these and does anybody have a picture of the fuse box fuse layout of what fuse powers what?

Well so far

We've discovered

Garrett turbo
Weber FPR
FPR gauge stating just over 3bar
Boost gauge running 0.7/0.9 bar
Dump valve
Possible a remapped or different ECU
A massive induction kit

should this be run on super unleaded or can normal 95 Ron go into these.

Main problem
When cruising on boost the car jerks and looses boost all the time on boost

I'm going to service it
Rotor arm

I've still got original airbox in boot so might reinstall that aswell

Any ideas on boost problem???