SOP: Brakes locked so it doesn't roll away on setting it down, steering locked by way of vehicle design, not a prerequisite.
Ground crew rigs load, sometimes also hooks load to hook or the aircrew hooks load.
Helicopter hovers in, ground crew uses probe to ground the helicopter to keep "the lightening" aka static charge from knocking them on their ass and then place sling eye on hook/s.
Ground crew gets clear of load, slings brought tight, load comes light, aircraft leaves with load.
Aircrew, hover in calling to the pilot where load is and where helicopter is in relation to load.
Grounding probe out to ground static charge, shepherds hook used to pick up sling eye and places it on hook/s.
Slings brought tight, load light, clear around aircraft and they are off.
The birds with multiple hooks likely use ground crew more often anymore as the other extra hooks are a bit further from the hole and would be tricky to do from inside the aircraft.