In the upper picture posted of the cables/linkages at the throttle body, the mechanical linkage on the far right with the flat, slotted bar, the U shaped pivot, and the additional linkage arm from the pivot down to one of the levers on the transmission are your throttle pressure linkage system in total.
Very easy to identify the throttle pressure rod at the transmission by simply trying to move the two rods, preferably with vehicle not running and in park and the E brake applied. The throttle pressure rod will move easily when pushed toward the rear of the vehicle and snap back to it's original position when you let go due to its spring loading. The gear selector rod will likely be immovable unless key in in the ignition and turned to on position. And if it moves it clicks because it has detents throughout its range of travel at each gear selection point.
In the bottom picture posted I can't tell which of the two arms are the throttle pressure linkage coming from the throttle body. If it is the linkage piece with the single bolt and spring on it, simply loosen the bolt and move the rod, in the clamp with the spring, forward so that less of the rod is sticking out of the back of the clamp. There is a limit on this adjustment at this point because there must be enough of the rod in the clamp for the bolt to tighten down on for proper holding. If it is the other rod/lever on the transmission there is no adjustment at the trans and you will have to follow the linkage up, toward the throttle body, to find/ locate another adjustment point in the linkage system. Mechanical throttle pressure linkage is always adjustable somewhere in the system. It will likely take a couple of tries to find the sweet spot your looking for as there is no magical formula like extending rod length 1/8" equals 1000 RPM shift delay.
Hope this helps.