MK-62 + EAX20, now adding another MS-60

I have an MK-62 with EAX20 Extender at the moment.

I have just purchased another MS-60 to add to the MESH.

My question is

- When adding the new MS-60, do I first switch off the EAX20 and then install the MS-60 and the EAX20 as new devices to get the MESH setup properly?