Side,l will have him connect the 3rd return.
I am not sure what the pipe with the 'T' is after the SWCG, but that is not where a return should be.
The actuator that is after the SWCG is what sends water to either the Spa or to the Pool returns.
To be honest, I have no confidence that your pool guy knows what he is doing.. Maybe he does, and we just have a communication issue, but I can't make heads or tails of what he is doing,
Let's see if @1poolman1 has anything to say...
If your pool is empty, show us any pipes or eyeballs you see in the side wall of the pool.
Thanks,
Jim R