I have a mast mounted pre-amp with the power injector in my living room. I want to split the antenna signal below the pre-amp to a cable going around to the other side of the house.

Now, do I use the pass-through port to plug in the line that goes to the power injector and use the passive port for the line that goes to the other side of the house? TIA.

^ correct.

Thanks, I appreciate it.