It's already written blank paper ticket, so your uncle paid ticket price till Saugor but he will take punjab mail till Bina Jn. and take any train towards Saugor
For genral class travel he has to not require any seperate tickrt but for travel in sleeper class he has to book another ticket. For this, your uncle has to only fill reservation form and present original blank paper ticket at counter and take reservation for any train in sleeper class and do journey towards Saugor from Bina Jn.