How to Add a Shared Calendar
Go to Google Calendar.
Look at the left menu. Click the + (plus) sign next to Other calendars.
Click Browse resources.
Click your building to expand the list.
Check the box next to the room or cart you want.
Click the back arrow (top left) to return to your calendar.
How to Book the Resource
Create a new event on your own calendar.
Click Rooms (or Add rooms/location).
Select your room/cart from the list to reserve it.