k thanks

Not_Crazy010 Hit the red button on either the maintenance panel (or mini panel near the station) to have a cart in circulation stop on the switch track, then, use the arrow buttons to move the track to the maintenance bay. You can then use the maintenance panel to put the cart in a storage spot.

Or if moving a cart from maintenance to circulation, hit the arrow to bring the empty ride track over to the bay, hit a colored arrow button to bring that respective cart towards the switch track, then use the arrow to move the track back.

Also, the ride system needs to be switched on for this to work (the key in the main control room)
You can also watch a mildly informative instruction video here: https://youtu.be/ihzUE2PIvnU?t=568