How do you remap the key for manual torp bombers?

[_Brew_]

I know the button for manual torpedo runs in Left Alt, but I want to change it as that is also my push to talk (and I'm not changing my push to talk).  However, I don't see this command listed anywhere in the settings.  So is there a way to remap the manual drop of torpedo bombers?  Will Right Alt also work so I don't have an open mic every time I try to line up a bombing run?

 

Any help is appreciated.

 

 

*Update* Right Alt works - but I'd still like to know if this can be re-mapped.