I basically created my own harness using some various parts but it would be nice to have a connector built-in that corresponds with the pinouts for each input and have a wire harness that just plugs into the Konnected board. It would need to be color-coded i.e (black/black stripe, orange/orange stripe, ...) for each zone.
You could spice all of the wires to the harness first and then just plug the harness into Konnected. It would also make upgrading to new boards easy.
Similar to a car stereo harness. (picture below)