There are several Sioux instruction and parts manuals on Ebay. The closest I see to yours is a Model 2075. It's on a CD for $5.00. I have used that attachment many times, but it's been so long ago I'd just have to figure it out by trial and error now.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!