Ok i checked the bowden cable and it seems to be not in a bad place as far as i know. Some immediate tension when pulled. But i am willing to tighten it and see what happens.

But first, i wanted to share this.. I finally went through the VAC connections and found two discrepancies... They are notated on this image below.
The red lines are a non-connection. The blue line is a new connection to cabin.

Any thoughts about how this could relate to my issue?

What if PO or PM had bypassed the "65-Vacuum Control Valve" because it is faulty?

The broken connection from turbo to "81-Switchover Valve, Vacuum Converter" seems to be just that the tube popped out.

As far as i've found thus far, everything else is in tact.