Making USER1 range toggle an I/O pin (turn on the VTX on Zeez F7)

[NameOfTheDragon]

Dear all, I wonder if you can help me understand something.

I have a Zeez F7 flight controller. In BetaFlight this has been migrated to a unified target. The VTX power on/off is controlled by the USER1 range and in the BetaFlight target definition I believe that is defined like this...

resource PINIO 1 B11

and

set pinio_config = 1,1,1,1
set pinio_box = 40,255,255,255
set box_user_1_name = VTX SWITCH

This doesn't work in iNav, probably because it hasn't been defined. How would I go about hooking up the USER1 range to an I/O pin in iNav?