All router, no Coordinator.

I’ve five ConnectPort X2 (XBP24-DM) , all of them a routers. How to make one of them Coordinator? In X-CTU, in Function Set there is no such point.
See link:

Digi Mesh does not use Coordinators. It only uses a coordinator like function when using sleep modes. That is to say, it is a true peer to peer mesh where all you need are nodes within range of each other to form a mesh that are also on the same ID and channel. Nothing else. Simply set your DL and DH addresses to the SL and SH of who you want to send the data to and send it.