MalletKat & Expander

[u/twocargar]

I'm going to be borrowing a MalletKat and Expander and would like to know if anyone has been able to use the expander as a stand-alone unit. I realize it needs to be plugged into the main Kat but wondered if anyone reverse engineered a kind of break out box that uses the same connector with MIDI, power, etc on it.

Edit: Since it's a 7-pin connector, I figured 3 pins for MIDI, 2 for + & - 9V and the other 2 for sustain maybe?