OSD what different MSP BTFL, INAV and FETTEC

[fruts88]

Hello.
I have 3 FC Mamaba MK4 F722 MINI, WING and G4 Alpha.
Does not work OSD on Avatar Googles with INAV7 (6, 6.1) and FETTEC.
With BTFL OSD works.
I think The problem is in different the firmware BTFL and INAV for my flight controllers.
In FC firmware BTFL pin VTX FC is the same as pin RX3 FC, but in the firmware INAV pin VTX and pin RX3 are different.
I soldered one wire to RX3 FC and the osd INAV started working.

Do you know which command are doing it in the CLI line INAV?
I’am afraid I can’t solder the wires on other units (I haven't pin connector).

Than you.