You're right -- the docs have no definition of the terminal labels. I've seen L used for line. Of course, it might mean load. And what's the sense behind T meaning load? Or line?
I'd look at the relay and wire the line to the set of terminals closer to the base, that is, further from any prying fingers; that's only if the physical construction makes that possible.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
