NEILFarmer - 7/17/2013 21:16 On the combine the male and female are reel and should be hooked together if using machine on corn or something with out reel. The one going to feeder house on self side is reverser or variable speed reverser. When combining corn hook it up to the hose or coupler that comes from under the combine cab and can adjust head speed, it's right below the steering wheel. Not sure if you including that in your list or not. On our 77 their is a 45 and coupler mounted right to cab, you would never see it unless you looked. But anyway for soybeans you will slow the reverser all the way, unhook the hose and hook up the reel lift hose. The 9 pin connector sounds right but i'd have to look at our machine again. Bean head i don't know much and will be learning before fall. We just got a 1997 922 to replace a 220. The 220 worked perfectly with 7720 setup perfectly. I know we will need to run a few hoses across the feeder house somehow, if the 2001 head is setup for dial a matic you can get an adapter from deere to make it work. Don't know what you do if your head is newer style header height. Hope this helps somewhat. Now i see the pictures. I don't know what is up with hose with red plug in it. By the way the reel hoses were run across the feeder house looks like that 8820 has been setup to run newer head in the past.