David,
Not sure about your TB but on ND the coax runs from the electrical bay connection to a 1 in 3 out splitter in a cavity behind the fireplace. The splitter then has cables that run from there to the 3 televisions. Rather than running a new coax can you locate the splitter and hook in there?
__________________
Dave
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk (Toad)
FMCA - F432054
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