I'm not sure exactly what your asking, which booster you are referring too (black one included with install, or the White Telus Boost WiFi, so here are multiple scenarios.
1. You would like to connect your PS4 to booster #1 using an Ethernet cable.
2. You would like to connect your PS4 to your booster #1 using WiFi (and preventing PS4 from connecting to booster #2)
Hope that helps 🙂