please share whatever you have been shown (photos / 3d Renderings ?) as I am curious (and others probably as well) what this is about.
I soldered the button to a long wire that I am guiding along the left shoulder strap to about where my chest is. it is for now just dangling off from the should strap, secured to the same. I can easily reach that button and turn the whole battery on or off very easily during flight (even though there is no reason to turn it off, as there is no energy consumption when the throttle is not pressed.)
On this photo you can see how the wire is coming out of the case:
You can also see the four main power cables.
the other black cable that you can see coming out of the same opening is just a loop and the negative terminal of the three fans. I later added a switch to be able to turn the fans on and off (for charging they need to be turned off).
I did it the same way as @GliderPilot, except for the two switches, which I can just leave out of the equation, since the BMS does the on/off switching. Here’s a photo from his build log:
When I was thinking about my case, I had plexiglas (acrylics) in mind as well, but others suggested to not go for acrylics, as it is very brittle, but to better go for polycarbonate. However I did not find anyone who offered to lasercut polycarbonate - I then went the aluminum route - but air gaps and good ventilation is definitely the right thing to keep in mind!