The two larger hoses/connections are for the reel motor(speed) and the small hose/connector is for reel lift which is a single acting circuit. The same goes for the 1020 also, the extra two hoses/connections on the 1020 are for the reel fore and aft. You can either add a valve to the combine to get fore and aft or position the reel manually and lock it place by bolting or find a set of hand cranks for the reel fore and aft for a 1020 head.
To connect the 1020 to the 1460 you will have to change a coupler and lengthen the hoses. If your combine has electric header height make sure you have the correct sensor and connection on the head as well. If the combine is mechanical header height you can get the cable and brackets to connect the two through parts from a dealer.
You might have to grind a couple of grooves in the feeder lower jackshaft as well to connect the 1020 with the stock shafts.
To connect the 1020 to the 1460 you will have to change a coupler and lengthen the hoses. If your combine has electric header height make sure you have the correct sensor and connection on the head as well. If the combine is mechanical header height you can get the cable and brackets to connect the two through parts from a dealer.
You might have to grind a couple of grooves in the feeder lower jackshaft as well to connect the 1020 with the stock shafts.