The 25-year-old signed with United in January, but has yet to play for the club after being sent immediately to Greece on-loan.
The former Petro Atletico hitman has impressed for the Prasinoi, scoring four times in seven league appearances, and will join the United squad for pre-season training in July.
Manucho is pleased with the steps he has made during his time in Greece, and hopes to feature for the Red Devils next season.
"Since the end of the Greek league, I have been in contact with (United
assistant manager Carlos) Queiroz and I know that things are going
well," said the Angolan.
"I am not thinking about wearing a
shirt other than that of United. I am just thinking about playing in
the Champions League next season.
"It was a good experience (in
Greece). Had I played more games, I believe I could have scored more
goals and silenced those who still doubt my qualities.
"Overall, it was a positive experience. English and Greek football have different styles though."