76' 2+2

Thank you I've been out of town so when i get back ill take a look

I am new to this site and still fairly new to the Z scene. I have owned this 2+2 since last Dec.. and after 15-16 years the motor finally runs again. After installing the fuel tank i decided to test drive my baby that has just been eyecandy for me. Anyways once i put it in first it pulled foward but sounded very loaded. After roughly a foot of travel there was a terrible squeak and squeal. Basically how do i unlock the drums? Any help would be graciously accepted, thank you in advance