Hello,
Please note the CBW100 series wireless access points can mesh only with other CBW100/200 series APs and CBW100 series mesh extenders. They need to be the same product family. The older WAPs do not support mesh, these are older platforms running different code and you can't build a mesh network with the new CBW APs.
Here is a short guide of how to add AP/Mesh Extender to the WLAN:
https://www.cisco.com/c/en/us/support/docs/smb/wireless/CB-Wireless-Mesh/2057-2058-add-mesh-extenders.pdf
Thanks