Just tested the S-1 with the tracker with the cable I got in the mail today, works great so far looking forward to experiment with that.
I found a link to https://www.designacable.com/ on another thread
They make custom length (and color) “crossover” cables. Both sides are 3.5mm, one is 90degrees and sleeve on the wire with “CROSSOVER” in large font on it.
I like the idea of not needing/having yet another adapter that can disconnect or something clunky… and with shipping it was about as much as getting a dongle/adapter.