Hey guys, I'm looking to replace the antenna with an external RP-SMA connection. I'm comfortable with the solder of the coax but I don't know where to do it. On the front of the mainboard appears to be a ceramic chip antenna and on the back looks like a place where a UF.L connection would have gone. Any recommendations on which place I should start?

I've included pictures of both. I have more pictures if anyone is interested.

Front

Back