The flange is marked in and out. Out is feed, and in is return.
The white band should have a letter on it. M for mandare=send=feed, or R for ritorno=return.
Easy peasy.
... as translated from the da shop manual ...
ok-o; now-a its-a mucho clear-a!. gratzi. capich! lets-a reread-a ...
flange-y has-a in-ny & da out-a; ...(like-a all-a da mistresses...)
so of course-a just-a like-a da mistresses! you-a put-a da in-ny on da
man-dare-y ritoro-no go in-ny and out-y on-da man-dare-y
ritoro-no go in-ny... ce ce!
den-a da gas-a go in-ny to da injecto-ra into-a da piston-ey and-a KaPow-A! and-a VrrRooOOmM-AA !!!
easy as da pizza! capich!
gratzi amego.