place them as usual with in your development zone if they do not have any other abilities, like infiltrate, guerrilla training or para drop.
When activation/movement for said squad is due, just move the card without turning it upside down. This continues until you either do a attack with the unit that is the card, or the enemy manage a spot. then flip it as usual, place sergeant in the middle and then the troops around him just as usual.
(That should be correct, I'm kinda new to this as well though so someone else is welcome to confirm that)