Osmocom TX antenna selection


I have just received my second antenna and want to begin testing our TX flow graph. I have see a couple other threads about the parameters and have looked at the data sheet, but I am not sure what exactly to input into the antenna on the osmocom sink block for gnuradio.

I have seen to put OUT1, OUT2.
I have also seen PAD1, PAD2 and I have seen BAND1, BAND2.

Which one would be set if I want to transmit with TX1_1?

Also, if I want to TX with TX1_1 and TX2_1, how do I distinguish the two in the sink block.