Hold on to the wire when you ... A standard RJ11 wall phone jack doesn’t have enough terminals for an ethernet connection, so you’ll have to replace it with an RJ45 ethernet jack.

Someone installed my cat6e wall jack using the "A" pattern. (The A and B patterns are printed right in there to compare with the actual wires.) I checked it and it's "A". I have now put an rj45 ...

And crimp RJ45 ends to the cables at their wall ... you use modular keystone jacks to terminate the wire in the wall. you will also need to provide a keystone jack for the coax.

Connect a second cable to the next available jack on the router. Plug the other end into the other jack on the splitter. Plug the opposite end of the splitter into the RJ45 jack on the wall plate.