7363 is an EoL AP. So, we do not have 104.x firmware released for it.
You can upgrade the AP to the ZD's image with the below process.
1. Login to CLI/SSH of ZD using any tool like Putty,etc.,
2. Follow the below commands.
ruckus>en
ruckus#config
ruckus(config)#sys
ruckus(config-sys)#ftp-anon
ruckus(config-sys)#end
3. Browse
ftp:// IP address> and select ZF7363 folder. Save the file with name rcks_fw.bl7 file.
4. Upgrade the AP using this firmware and connect it to the network.
AP should auto discover ZD if there are on same L2 network and should connect.
-Anusha