je57rc10

I'm installing a camera on a pole. The camera has a rj-45 block connector (female) too big to pass through the holes of the NEMA box that will contain my poe injector. I have 2 options: 1- make the hole bigger and find a way to seal the opening 2-make the connection outside the box. I'm looking for a junction box similar to Raymarine E55060 SeaTalk High Speed Crossover Coupler. Any idea? Or any other option?