Using 15-pin D-sub KJL flange for 13-wire server power button in vacuum chamber?

Hi. 

Short backstory. I'm doing a university project, and it involves a server inside a vacuum chamber (sealed from environment).

Thing is the power button is one this little board here: https://imgur.com/8uhDkpU (the one right beside my thumb); and this is the back of it:https://imgur.com/AfT74nC

While the entire server has to be in the chamber, the button should be outside. There are 13 wires to it.

My current idea is that I weld a KJL flange on my chamber which is a 15-pin d-sub, like this: https://imgur.com/eSC1rgW (front) and https://imgur.com/ycikn17 (back).

Then I would cut the 13 wires somewhere along the middle of their length, and solder them onto 13 of the 15 pins, matching 1-to-1 on each side of the flange.

Reason I'm choosing this flange is for its sealing purposes.

So before I jump into doing this, I'd like to ask for opinion if that would work, or will it be a stupid idea? I'm a mechanical engineer, and only a student at that, so I've hardly touched electronics before. Really don't want to cause some short/open circuit for my server.

Thank you.

Depending on your chamber, how about using ultrasonic or RF control?

Provided the RF signal can get into your chamber (like a glass panel) you might consider a garage door opener- I once bought a generic replacement where the output is a momentary relay. If you do go this way, there are methods for latching the power on.

Looking at your photo, the output of the relay could be connected across the pushbutton switch. Obviously your whole board would be inside the chamber.