Weather Rack RJ-11 Plugs

Is there any reason I cannot replace and extend the RJ-11 plugs and cables for the purpose of making waterproof pass throughs?

Since RJ-45 is a more available plug, I was hoping to use an RJ-45 waterproof pass through and then add a pigtail on the inside of the box to go to the boards.

I was not sure if the sensors worked off of some type of resistance and shortening or lengthening the cable would mess with their calibration.

Thanks in advance!