Just to chime in as a LV engineer. Not only is it in a bad spot and rusting, it’s a 1000mhz swept coax splitter. Aka old af. Replace with 3000mhz in a jbox.

Humble and Wilson Audio in the same sentence? Okay bud…lol

Go Wireless Point-to-point https://store.ui.com/us/en?category=all-wireless couple hundred bucks will get you almost gb throughput over the air as long as you’ve got line of site. Run remote exterior point-to-point to a poe switch inside then feed an indoor AP from that.