As I understand it the only difference between hand detachable sidelocks and those that are not is the need for a properly sized turn screw for those that are not. Hand detachable really means "screwdriver-less", in American terms. If you can acquire a properly fitted turn screw for your lock pins you can remove the locks and service them yourself.

And, I agree with Ted about the service interval. Barring submersion, or some other extreme conditions in usage, yearly is unnecessary.