Coax cable that is inserted into the wall.

So moved into this new house, decided to go with xfinity internet. I knew that they use a coax cable hooked to the router but stupidly I forgot this new house has coax cables permanently inserted into the walls. Xfinity Xfi comes with its own coax cable, so my solution is to buy a female to female coax cable connector. Do you think this would work or is there something better I can do to solve this w/o calling a tech b/ca of the recent outbreak? Kind of don't want anyone coming here right now, for my and their safety. Here's a pic that looks like my current set up, save it has a panel but with the cords all hanging out. Please, someone help me.