Filament Spool Bearing Bracket question

#4
Does anyone have pics of how everything goes together? I don't understand how it mounts to the bar using the T-nuts.
I added a standoff washer between the spool/bearing and the mount. I've attached the stl for the bearing here, along with a sketch of the assembly. I didn't use t-nuts because we had 8/20 bolts and hardware laying around for mounting it to the bar.
 

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