My bigger birds have additional safety(dummy) guards in addition to the tx ones.
They use a Deans plug set up for a kill switch, and a rx switch.
Have to plug in the Deans to power the esc, after the pack is installed, and the switch has to be thrown for the rx to come alive.
So for me, it's tx on, warning flashes for proper channel after it checks for someone else on the channel. Then I get a warning of no arm until stick is in the off position. Install packs. Install Deans. Flip rx switch on. Return throttle to off.
Turn switch on tx to kill throttle off lock. Surface/range check. Now ready to crash......err fly.