Are you using B-5 in UVI Workstation as a standalone app?
Are you using a Windows or Apple device?
I am not sure why you want to change the CC#s sent. B-5 has an assign controllers feature. Click on 'Advanced Presets' then ' Assign controllers', scroll to the item you wish to assign, for example, Upper Drawbar 1 (16'), click on the number to the left and change it to match the CC# of the slider on the controller you wish to assign to the upper manual 16' drawbar.
Repeat for every other control. Save and job done.
MainStage 3 | Axiom 61 2nd Gen | Pianoteq | B5 | XK3c | EV ZLX 12P Hoping everyone stays safe and well and sees this through to the other side