How do I thread a projector? (B&H autoload)

I've had this projector for years...a very clean Bell & Howell autoload.

Have the film in the front reel, the take up real in the back. The film's spokes-holes-or-whatever are facing to the outside. (Though the film might need to be rewound onto a different spool or something -- feeding backwards, but that doesn't seem to be the problem).

Just doesn't seem to catch on the sprockets. Got it feed through.

Are there instructions posted anywhere? Couldn't find any searching.

Thanks,
LoHiFi

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