If you deploy two launchers, I’m suggesting having a keybind to control which ones are active (i.e. try to acquire lock and fire) when you control them from radar unit. Cycle from both (default) to launcher #1 and to launcher #2. Keybind could be the same as e.g. select primary or secondary weapons.
And yes, I know you can go to preferred launcher and fire only from that launcher, but that adds delay and diverts attention away from radar unit surroundings.