(source: Iceberg Slim – Pimp, The story of my life)

The section that contains the expression:


”Top cut me into a stud who had a black LaSalle car in mint condition.He was out on an appeal bond and his lip wired him he was joint bound. I gave the stud four bills in his mitt. I paid off the last two notes on the wheels.”


Background:


Slim buys a car from a man introduced to him by his friend Glass Top. Slim gives the man four hundred dollars in cash and ’pays off the last two notes on the wheels’ I am sure that ’wheels’ means ’car’ here but I still cannot interpret the expression…