Two Mills is a town that is divided into East End and West End. The dividing line is Hector street, and Hector street has an east side and a west side. It's as if there is an "invisible chalk line" right down the middle of the street. What is unfortunate is that the only thing that is different in the east and west parts of town is the race that lives in each area. The East End is for the black people, and the West End is for the white people.
Hector Street was the boundary between the East and West Ends. Or, to put it another way, between the blacks and whites. Not that you never saw a white in the East End or a black in the West End. People did cross the line now and then, especially if they were adults, and it was daylight.
Other than the racial differences, East End and West End are a lot alike. Both sides of town have people who care for Maniac, and both sides of town have people who want nothing to do with Maniac. The socioeconomic status of both sides is similar as well. Two Mills is a fairly run-down and poor town, and the average education level of both sides is similar, too. We are told that Maniac is colorblind when it comes to racial issues, and that is why he simply can't see a difference between the West End and the East End. To Maniac, there aren't any differences.
Maniac Magee was blind. Sort of. [. . .] Maniac kept trying, but he still couldn't see it, this color business. He didn't figure he was white any more than the East Enders were black.