That’s a great photo Steve. Just what we needed to see. It shows where Parkland is in relation to the Trade Mart.
Before I saw your post, I found this photo, which doesn’t cover as much territory but shows how the road “fans out” approaching the intersection just after crossing the railroad tracks. From the camera position somewhere in the parking lot of the Trade Mart (blue circle), it would appear that the vehicles were turning right (as they followed the right curve) just before they turned left onto Harry Hines.

https://texashistory.unt.edu/ark:/67531/metapth20058/m1/1/
Thanks very much, Charles. Your photograph is a greater find! It shows the area up close, and was taken much closer to 1963 than the one I found!
The white building that appears in the top right background of the WFAA footage had me confused, and thanks to your pic, problem solved.We can that the building was torn down and replaced with a one story building. Great work, Charles!