Using Anel hive with a Flow Hive on top

I just switched to Anel hives for the bottom two boxes with the Flow Hive on the top. Has anyone used this method? If so, how did you secure the Anel lid to the flow hive box?

Hi Tamio, welcome to the forum. You might be able to purchase some of those locking devices online. Would you like me to find out where you can buy them?