Get a straight thru Y-splitter for the RJ12 (6P6C) with male on one end and dual female on the other:
?
?
Or, if needed to clear the IN power jack, a single female to dual female and make up a little cable, making sure to get the orientation of the wires right in the plugs.
?
Available at retailers, Amazon, Ebay, or ShowMeCables.
?
Just make sure it has 6 contacts, not 4. That's an RJ11 (6P4C), a common source of confusion.
?
Enjoy,
?
Mark C
?
