Hmmmmm..... now your intentions are quite evident, and unfortunately deeply wrong.
I personally think that your proposal is -please apologize me for being quite strong- really ill conceived even before being FIS-unacceptable.
You are trying to drive scoreboards, info, pc, actually alle the timing with a timer that actually has nothing to do with the competition itself, being a system outside the rules.
The official timing will be left alone in shoe boxes near the finish line. Oh my.
While I have no idea about the problems you may encounter to run some cables in your finish area, I believe that FIS did a good thing by deciding to set up strong rules for timing.
Rules that mostly help avoiding possible issues. Issues that are surely coming with such an installation.
You have here the opportunity to get help from highly experienced people like the ones who wrote before me. My suggestion is to follow exactly the diagrams and leave away the rest.
If the someone (the resort?) decided to host an USSA or FIS event, and the rules require wired connections, then wired connections should be available. No exceptions.