bought a 69 chevelle and to clean out the trunk and i found a blower motor connected to the back wiring hardness. is that an option? maybe rear defrogger? have no paper work on the car so i cant say. is that a rare option? also does any one know where i can buy the rest of it to make it work right?

Yes, it was (assuming it's not aftermarket) an option, connected below the rear package tray in the trunk. Rare, but you can still find them on ebay.

Look in the Interiors forum. There was just a post on this with diagrams and switch info etc.

What Steve said.:yes:

interesting, I never heard of that