Thanks, that's a very good advise but I have a doubt... The ribbon is a 10 pin to 16 pin so the 12 and 13 pin are free...
https://www.dropbox.com/scl/fi/7qwhp909hweeovs6mp5wg/stasis-back.png?rlkey=rbkw3641utqzfy5jhfhz9ua0h&dl=0
Have you a pic of the welded resistance on your brick? I have the bus board of Doepfer. I think the best and easiest way is to weld the resistance behind the bus board but this will fix the position of the module. Should pins 12 and 13 corrispond to the opposite side from red line of ribbon cable?
I notice that the background noise is quite typical for effects modules.