Ok, it seems to be these to arguments:
-- Targeting Pod, FLIR
elements["pnt_439"] = default_3_position_tumb(_("FLIR Switch, ON/STBY/OFF"), devices.TGP_INTERFACE, tgp_commands.Flir, 439)--, false, anim_speed_default * 0.5, false, 0.5, {0,1})
elements["pnt_441"] = default_button_tumb_v2(_("LTD/R Switch, ARM/SAFE/AFT"), devices.TGP_INTERFACE, tgp_commands.Ltdr, tgp_commands.LtdrArm, 441)--, false, anim_speed_default * 0.5, false, 0.5, {0,1})
Not sure how a track will help you in this, but if want one I will happily provide one.