I do not understand the part you are asking for.
My TV is in a cabinet behind DW seat. This made my outside TV installation easy. Put TV in front bay (27") and ran the cable up thru the cabinet to a tee. I also put both of the TV's , plus DVD, Sat receiver on inverter for use with out power or running generator.
Do you have a method of putting a "T" to split off cable to second TV?
2005 Damon Challenger 371