yagi antenna

Hey, I'm soon moving into a college dorm and the only type of internet there is through wifi (one hidden access point for 8 rooms on the floor), no Lan or cable. The students living there told me that in the rooms there's basically no wifi signal whatsoever. I was wondering if I could connect...

I'm new to wiring stuff inside cars and I'm trying to wire this (idk if its oem, aftermarket or what) https://imgur.com/a/jAlrTIa to this (the harness that would plug into the new stereo) https://imgur.com/a/kLVLKrb . I have the tools n what not to do it. Thanks in advance.