If you have the manual for it, it will probably provide the information you want. Otherwise, find the make and model number and search for a downloadable manual.
I just updated my Dometic manual awning with the Lipper Solera 18 volt power arms and the procedure for retracting manually is just to use a socket with a drill, and a ladder. There is a port with a stopper at the top of the arm that has the motor.
Retired but busier than ever!
2012 Newmar Bay Star 3302
5 Star Tune, SumoSprings, Roadmaster Steering Stabilizer, Blue Ox Avail
Brake Buddy, 2015 Chevy Malibu