*Save
*Click on the "Get the House ID Codes for this CheKin account" link to get your Checkin house ID
*Enter your Chekin House ID, The House ID can be entered once for the property and left empty per room. Entering a House ID in the room will override the property values value and can be used when each room has a different House ID.
*SAVE
*Tick "Bookings for the rooms you want to connect