Not sure if it matters. The users manual makes no mention of which hose goes where, just says to connect them. The chipper has a roller feed control bar that operates a valve to change the direction of the feed rollers.
Hook the hoses to the tractor and operate the chipper. See if the feed rollers function as described on page 25 of the owners manual. If not see if switching the hoses on the rear remotes changes the rotation of the feed rollers.
Side note: you're probably aware that the chipper requires 4-8 GPM and you will have to adjust the flow control valve on the chipper as stated on page 24.