1. Put BOTH APs on the local network so they can connect to the controller
2. Create a mesh cluster profile
3. Assign that mesh cluster profile to the AP group where you will place the two APs
4. Provision to two APs into the group above
5. Set the appropriate antenna gain
6. Set the main campus AP to be a mesh portal
7. Set the satellite AP to be a mesh point (at this point the AP will reboot and go off the network)
8. Install the APs in the permanent position and connect the antennas
9. Wait for the satellite AP to "find" the mesh portal using wireless and make it's mesh connection
9. In the AP group above, add the two SSIDs you want the satellite office users to connect to
Hint: The CLI command "show ap mesh topology" and "show ap mesh active" are good sources of information once the link is up (or to help get it up).