6x RCA ports for Front Left/Right, Surround Left/Right, Center, and Subwoofer.
The term "patched" in this context often refers to hardware modifications or "hacks" documented by the community to improve the stock performance of the HD Audio Rush.
To eliminate "hissing" or ground loop hum, users often patch the power supply using a DC isolator (like the B0505S-2WR2) between the 5V input and the main board.