Sorry. No idea. My electrician installed everything.

Hi SSR56
What do you want to use the trigger for? Normally you need it to switch on a power amplifier, for example, when the preamplifier is switched on. As far as I could see, your T&A is an integrated amplifier and has neither 12V trigger inputs nor outputs. So the answer is no, you can't.
Or have I googled the wrong T&A unit?
Put another way: Even if your T&A had 12V outputs there would be a conflict:
Both the Sonos and the T&A want to act as masters. Both either have nothing or "only" one output. But definitely no input. But to use the 12V triggers you need a trigger OUT on one side and a trigger IN on the other.
I have solved this problem with a "master-slave" power strip. The integrated amplifier is plugged into the control socket. Only when the integrated amplifier is switched on are all the other sockets supplied with power.