Hi, Kevin
To set this up, OEM 1000 is "Cycle Start", OEM 1004 is "Single Step", In Config, Ports-Pins, Inputs, OEM Triger's as below.
Then set, Config, System Hot-key's to 1000, 1004 as below, As set up below.
Pin 11 will turn On & Off "Single Step", Pin 10 will let you step through the G-code "Cycle Start".
Hope this Helps, Chip