2000 Pontiac Sunfire Sunroof won't close

I got this second hand about 7 years ago and for some reason I didn’t get a manual.

When I removed the headliner I could see a red plastic turn as I try to open or close the sunroof. I suspected that I could use that to manully crank it close but was not sure. There is an opening in the center which looks like an allen wrench could fit.

Should I disengage the motor first before attempting this?