I disagree. The shadow of the traffic light pole indicates Baker is on the other side of it. Plus it appears to me that his helmet disappears behind the traffic light pole. I do believe the no parking sign pole is on the other side of Baker.

Baker's head/helmet is consistently obscured by 2 people that are also in motion. This "three card monty" is deceiving to the eye. Officer Baker's boot is not obscured by anything. It even glistens in the sun for a couple of frames. Baker is clearly on the (R) of the traffic light pole.
The motion of these 2 people is also why we need to be very careful with the placement of Fedora Man. Fedora Man is also moving around as Wiegman was filming this same general area. And Wiegman was panning his camera while filming from inside a moving car that was turning onto Elm St.
As the JFK Limo passed by an eyewitness, and that eyewitness then could only see the back of JFK or Jackie, they generally began to move around. This is natural. By the time that Wiegman began filming Fedora Man, the JFK Limo was well down Elm St.