Howard e series rotavator drive shaft

/ Howard e series rotavator drive shaft #1  

SolidGround

New member
Joined
Jun 5, 2013
Messages
3
Location
Belchertown,MA
Tractor
Massey Fergusson 65
Hello, I have a Howard e series rotavator 5' wide. It has a slip clutch assembly and a square slot 1.25" coming out of it. I'm not sure... What goes here? How do I connect a PTO drive shaft to this? Doesn't look like there's anywhere to lock anything into the slot. I'm used to splines. I tried to add an attachment picture, hope it worked.
 
 
 
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