Master cylinder identification

1985 gti cc
Brake are terrible with no stopping power at all si going to go through them al but looking at master cylinder has given some concerns…..
So for a start i have 2 brake light switches in it but none wired and i use a switch on pedal.
The cylinder has a total of 6 outlets 4 on top 2 underside
1 switch either side of top


Whats going on?