it appears the cables are missing and the crank mechanism as well, on the outer panel on the right and left side there are those 2 bolts attached to that round piece, that round piece is your hight adjustment and the part that bolts to it are the front guides. you will need to take the bolts out, lift the front part of the panel out of the hole then guide the rest of the panel forward, in the rear you should see additional guides ,i do not rememebr what they look like from memory but i do know it doesnt take much to remove the whole panel. once you have done this you will see a cover that goes accross the front that would cover the cables,it will be held on with screws, remove the screws, tip it up on the leading edge and slide it out from the tracks. you will know right away if parts are missing. ie... the cables,guides,crank mechanism. take a few more pics and post tthem viewing from the top, left, right and front. it also appiears the shade is missing fromt he pics you posted. so you are aware, this unit was made by ASC , i believe some parts are still around and some are being reproduced , also your roof shares many of the same internals as the ford/Mercury sunroofs of the same period, dating all the way back into the late 60's when at that time it ASC was actually Golde sunroofs being installed by ASC (same product) eventually it all became ASC...