Using a tapping attachment with a CNC bore cycle

I picked up a Procunier 1500 series tapping attachment on Ebay. It got
here today so I spent some time looking at it, making friends with it,
sort of. It has what I think is a setup for a tool changer - it locks
the spindle when it comes full up, so I took that off since I don't have
a tool changer.

I put it in the manual mill, it will unscrew its collet chuck if I pull
on it while the mill is going around. Hold it, it screws on. pull
lightly and it unscrews at 2X speed.

I think it will work with a standard bore cycle. If the 2X speed has it
trying to get ahead of the retracting quill, my thinking is it should
just disengage and stop till the quill gets ahead again.

I'm planning on adding a handle that sticks out to the side like I see
in the catalog pictures. At that point I run out of notions on how to
use it. Do I add something that sticks down to keep the handle from
rotating? How is this done - are two things put there so the handle is
captive? Or is it allowed to rotate a full turn?

I'm puzzled.

Fitch