The chair is not really anchored on the lift. If someone is pushing you in a standard chair, then the person with you backs you onto the lift, you are instructed to lock the wheels, then you are raised up. The person pushing you stands on the lift behind you and then pushes you into position on the bus. The driver then straps down the wheelchair in the proper position. The wheelchair passenger has the option of staying in the wheelchair or transferring. On the busses with ramps, your "pusher" companion just backs you into postion onto the bus. If you are rolling a manual wheelchair yourself, then you just back up onto the lift, lock your wheels, then you are lifted up. With the ramp buses, you just go up the ramp, then maneuver into position on the bus.
If you have an electric
ECV then you back up into position onto the lift. Some drivers ask you to turn your key off. You are lifted up, then you maneuver your ECV into position onto the bus. The bus driver then straps the ECV down. You have the option of staying on the ECV or transferring. On the buses with just ramps you will back up the ramp in reverse. (Some buses allow you to go on forward).
Yes, you get on first, then get off last.
I hope this answers your question.
Carol