How to simply assign a damper pedal on S88 MK3 ??

Lutz Multimedia LLC

Hi

My sustain pedal works fine on my S88 MKIII but I plugged a second midi pedal (On Stage or something generic… on and off signal) to the other input on the back and cannot for the life of me figure out how to permanently assign it to be a damper pedal for simple piano work.

I have scoured the forums and even chat GBT said its impossible (which is absurd). How can I simply set this up? Any helkp is greatly appreciated. Thanks in advance! - Josh