Well there's these commands to use:
ce hench_picksquad - select available henchmen where you are standing (in the middle of mission).
ce hench_pickany - select any henchmen from full list where you are standing.
But as pointed out before, you'll get the selection screen if you start the mission from the normandy.
Update: codes you provided for team selection are working! I only used them once during cutscene on kodiak shuttle and after that game finally started allowing me to choose my squad before missions.
Thank you very much for your help!
