We alas need SPDT.
I want an IDC on the input to meet the cable from the I2C decoder.
The output will be cables headed out of the cabinet.
& found https://www.aliexpress.com/item/5pcs-relay-24V-8channle-relay-module-relay-expansion-board-low-level-triggered-for-arduino/32522339358.html but check the shipping for Q4.