What amplifier is powering these ceiling speakers? The CONNECT has a line level out, it doesn’t have an amplifier built in. That would be a CONNECT;AMP, or it’s replacement, the Amp. The only way your CONNECT would work is if these ceiling speakers are powered, something rare for in ceiling speakers.
Normally, the CONNECT would be connected to an Amplifier of some type which is powering the speakers.
Mod Edit - changed “Port” to “Amp” prior to marking as Best Answer
That would be a CONNET;AMP, or it’s replacement, the Port.
A small misspeak: it’s the Amp which succeeded Connect:Amp.
Sorry, ratty is of course correct, that’s what I get for answering questions before consuming caffeine.