Olá Carlos,
I had exactly the same problem, even worse, i had my boxes mounted out-side (luckilly the algarve climate is user friendly) - but decided to pass the cable through the wall. Made the hole a bit bigger, took of the N-connectors off, which was much easier than expected, passed is and replaced the connecters, which was even easier. So yes, try it, definitely worth it.
Let us know how you get on.
Diederick