Audi a3 help please

[audia3turrbo]

I fort as im on here now i no you guys like to no whats going on with other peoples audis but this is realy starting to bug me,i have had 2 audi a3's and i cant find a hole to put my sub wires through,plus i wanna put a boost gauge on,it is a 1998 model if this helps and is there any point putting on a boost gauge as its only running 205.8 bhp let me no whay u guys this and what gauge is recomended,and also always willing to buy new parts alloys exhaust ? let me no guys many thanks.
DONT JUST READ THIS AND DONT COMMENT LMAO I NO I HAVE DONE ALOT OF POST BUT HEY THATS WHATS THIS SIGHT FOR