Basically you just swap the orange and black wire on most of the motors I see.

Use the standard cross connect method on the DPDT sw.

[Linked Image from gfretwell.com]

Furnas has a lot of diagrams for doing this with their drum switches and various motors.
See page 5
http://gfretwell.com/electrical/Catalog%204258%20Drum%20Controllers.pdf



Greg Fretwell