Ok, no worries, No need to lock the scope for a polar allignment. You undo the RA Clutch (Im assuming you have an Equatorial mount) and rotate in RA untill the stars match the etchings, you can get an idea where the actual stars are by a star chart which matches the day/week/month your observing or imaging - or if you have 'Stellarium 'freeware prog' as shown in attached pics.. and Note where octans is today at this hour = 1st pic , , & where it is in 2 months time at this hour, ie 9:30'ish
Once have polar allighnment, then set scope up in park position, lock the clutches, turn mount on, set up time date, longitude Latititude etc, and do a star allignment
