Thanks for posting.
Yes, who knows about the mysterious cars driving in and out the railroad parking lot, probably nothing.
The important part of this interview, captured on film (~5:55 forward) is Lee Bowers describing the cadence of shots. The "bang....bang-bang" cadence. Bowers knock-knocking on the table is far too rapid for shots from a single-shot-per-bolt-action rifle (the M-C).
Dallas Sheriff Seymour Weitzman also said the second two shot reports were "almost simultaneous," and Secret Service man Kellerman said the shots arrived in a "flurry," while Gov JBC said he thought the shots were fired from an "automatic." Some of these guys were veterans, and other law enforcement officials---people familiar with gunshots.
This all lines up with JBC being shot ~Z-295 and JFK at Z-313---as it appears on the Z-film.
The LNT SBT theories do require some suspensions of disbelief.