For the footswitch, a normally open switch is expected on the ring terminal. The 10k resistor on USB R4 might be a bit large. 4k7 could possibly work better. The functions are so defined in the HWCFG:
BUTTON_FOOTSWITCH 1 5
BUTTON_FOOTSWITCH 7 5
Press&Hold the footswitch to enable record mode, release it to disable record mode.
Tap the footswitch shortly to delete the track.
Or it could be assigned to another function.
The gate input is on the tip of the 3.5mm jack, expecting a +5V gate, then converted like a Moog S-trig. It would have the same shift register address as above (depending on the LH/RH version), but for pin 6. It can be assigned to any empty switch function in the HWCFG.