Electrical Reference Cable for ZMI Boards

The connector fit perfectly on my ZMI boards and now all measurement boards are syncing without any timing drift. I can finally run multi-board setups reliably.

Swapping these in fixed a glitch where my boards were reading different voltages on the same signal. The cable length is just right for keeping the reference line clean between units, and the connection feels solid once clicked in. Exactly what I needed for a proper multi-board setup.

Wasn't sure I needed these until I daisy-chained two boards and everything finally synced up cleanly. The connectors seat firmly, no wiggle, which matters when you're running a multi-board setup.