I think you will find that Chapter Four contains the information you are looking for. Having escaped a terrible fate of working as a chimney sweep, Oliver is then taken in by Mr. Sowerberry, who is an undertaker and whose business is death. Therefore, after having this decision approved by the board, Oliver is taken by Mr. Bumble the Beadle to Mr. Sowerberry's abode where Oliver is to live and work. Note the conditions that are given by the board:
Mr. Sowerberry was closeted with the board for five minutes, and it was arranged that Oliver should go to him that evening "upon liking"--a phrase which means, in the case of a parish apprentice, that if the master find, upon a short trial, that he can get enough work out of a boy without putting too much food into him, he shall have him for a term of years to do what he likes with him.
Thus the uncertain future of Oliver is decided as he leaves the workhouse, and his position as a dependent, friendless boy without connections and free to be abused by those who have power over him is confirmed. This is something that becomes more evident when we see the precise nature of his work at the Sowerberry's house and how he is mistreated by all concerned.