Got it working (finally)! Connected through USB and the camera kit.
What helped me was this tutorial: https://help.positivegrid.com/hc/en-us/articles/207485486-How-to-Control-forScore-with-BT-pedal
Turns out the ‘listen for input’ function on ForScore is a lifesaver. It does not matter what value or channel you set on the QC, it recognises it automatically.
What would be a great addition to this function is being able to assign midi out signals for buttons globally. Now I have to set this midi setting for every preset and its not usable in preset mode. I would gladly give up one of the buttons (probably E) to make that a permanent page turner.
Edit: Made a feature request here: Global button assignment for Midi out signals