HP DT530A User Manual page 22

To move the numeric keypad from one side of the modular
keyboard to the other side:
1. Remove the RJ-45 cable (that connects the numeric keyboard
to the modular keyboard) from the cable routing channel on
the bottom side of the modular keyboard.
Removing the RJ-45 Cable from the Routing Channel
✎
You do not need to unplug the RJ-45 cable from the back of the
modular keyboard.
User Guide
Setting Up and Using the Modular Keyboard
www.hp.com 3–3