I don't know if you have any extra ring terminals/wire, but have you thought about doing a video on a test where you cut through a terminal that was crimped with the hydraulic crimper? I've seen photos where those crimpers basically fuse the strands and the terminal into a solid piece of copper.
Looks awesome and clean on the build btw!
It's an interesting device, I'm usually a first day adopter of Apple's tech but I sat this one out since I'd like to see a little spec bump on it. None the less congrats, and hope you enjoy it, it looks great!
Simple answer is nowhere, Termlabs use a pressure sensor not a microphone. There's some Russian company Called SPL Labs that I think made a good meter that was close to the termlab.