Have been trying to find P/N's for the I/O card connectors (designing my own I/O card) most importantly for the connector used for the 8-pin M12 (labeled #16 in the manual), but it would also be good to know the P/N for the terminal block used for the 4-pin M12 connector.
However, you probably won't be able to source this, and new cards have a single 4-pin connector instead of two 2-pin screw terminal connectors. Fortunately, you should be able to source a standard 3.5mm screw terminal connector from almost any manufacturer and it should fit.