The safety button can be used both ways. You can use it as a panic button or just quickly press it and release. It can also be used to schedule a check-in at a certain time.
You don’t need to provide information on what is going on before using the button, but that information can be useful in the event that emergency responders need to be dispatched. You can also schedule a check-in at a certain time.
If a PIN hasn’t been entered after the button was released, they’ll text and call to check on you. If contact can’t be made or emergency assistance is needed, they’ll dispatch the authorities.
Another way that I’ve heard it be used in scenarios like the one you mentioned is to activate the button, wait for them to call, and stay on the line with an operator until you arrive at the car safely.
More information about it can be found below.