Master Start joystick command

I'm trying to program buttons on a joystick for a twin jet. My plan is to assign one button to start engine 1 and another to start engine 2. I've found the commands to open the start values for each engine and it works nicely (TOGGLE_STARTER1 and TOGGLE_STARTER2). Now the problem. Under the throttles, there's a small lever that is flipped up at around 20% N1 causing the engine to spool up. Mousing over this switch gives me the name Master Starter Switch (on/off).The only command I can find is Master Starter Switch - but it toggles the switch for both engines together. I can't find a command for just engine 1 or engine 2.What's interesting is that the commands MIXTURE1_LEAN causes the master starter switch for engine 1 to cut-off - and of course MIXTURE2_LEAN does the same for engine 2. However, MIXTURE1_RICH does not cause the master starter switch to go to the on position.Does anybody know if there is a command that will cause the master starter switch, located below the throttle, to flip to the on position independently for each engine Because it can be done by clicking on the panel switch, there has to be a command. Does anybody know how to look at the code for the panel to find the command?Thanks