Normaly you have to turn the crank ccw a bit to activate/release the cct.
Important, the guide pins for the chain guides have to be inserted so the guides are hold in place.
Some times they are stuck in the cover and pull out when cover is removed.
I don't like to turn the engine before i know the cct is in action so i stick a large screwdriver on the inside of the chain guide, approximately to the pos of the cct and gently push the guide towards the cct until i feel it release.
Then it's ok to check the function by carefully turning the crank a little bit in both directions.