At the end of the movie Marty leaves the stalled DeLorean on the road next to the clock tower to catch up to the Lybians en route to kill the Doc. After Doc is found to be ok, they leave and Doc drops off Marty at home in the DeLorean and then goes into the future. So did they take the white hauling truck to the time machine, put it in the hauling truck, drive it out to Docs and then Doc gave Marty a ride home? Did they simply drive the hauling truck to the time machine and leave it there? Or did they walk to the DeLorean and leave the white truck at the mall? Its not clear...is it in the mall parking lot...at Docs house...or on the road by the clock tower were Marty stalled and left it just after returning?