Here is a link to the patchbay. There are many vendors. Price usually about same.
Link to patchbay I have the channels I want to use for the 7.1 "normalled", meaning that what goes into the top of a column of two (in the back) comes out the bottom. The bottom back jack is connected to 7.1 analog inputs. The top is connected to whatever I want as "normal" or default. Then I do nothing and it is connected. I have other equipment which I want to access the 7.1. These devices are connected to other jacks. Using patch cords I can then patch the others in, by passsing the defualt device.
Here is a link
Link to equipment in living room showing patchbay and various devices to patch int 7.1 analog My equipment is mostly in a 19 inch rack. Very convenient. but not for most people and/or their wives. I'm fortunate in many regards. this being one.
There are also shorter racks a vailable. You can see in the second picture that my second 990 is mounted in a MIDDLE ATLANTIC RACK PANEL, made specifically to fit the 990.