vacuum hose routing question Options

[L-Jet914]

I was installing my new ignition and FI harnesses today and I decided to look back at the vacuum hose routing diagram on Jeff Bowlsby's website. I knew my vacuum hose routing had been modified by whatever technician worked on my father's 74 914 1.8 years ago. I noticed that they teed the vacuum retard side of the vacuum advance into ported vacuum off of the intake plenum. According to the vacuum routing hose diagram, it's supposed to be connected to the rear port of the throttle body (which only gets vacuum after the throttle plate moves off idle). Would there be any reason the technician did this? I will end up rerouting the vacuum hose to the proper location. I'm just curious as to why it was modified for whatever reason. So would my 74 1.8 be considered a early or late 1.8? According to the late diagram and the throttle body that is in the car, the hose should route to the front port instead of the rear port.
The part number on the throttle body in the car 022133067C which fits either a Super Beetle 75-79, 76-83 Bus, or 83-84 Vanagon (two port t-body). According to the PET on AA's website shows two different throttle bodies 022133062L or 022133062S for California spec 1.8L 914s. The Porsche PET does not list a throttle body part number for the 1.8, only the 1.7 and 2.0s. Curious as to why someone would put the wrong part number throttle body on my 914, though it does have the 3 pin throttle position sensor. Port setup would be indicative of late 74 because the required port (front of throttle body pointing toward front of vehicle) is behind the throttle plate.

[L-Jet914]

Sorry for opening up a can of worms haha. When I ran the part number on the throttle body that is in the car, it fit the vehicles listed earlier. The retard side of the vac can is connected to a second vacuum T fitted in between the line that is meant for the FPR and decel valve. The retard side of the t-body was capped off lord known when. Vac advance was already connected to the port facing the rear of the vehicle when I initially started replacing vacuum lines years ago to fix vacuum leaks in the system. According to your vacuum hose routing diagrams Michael, there should be only 1 T-fitting off of the intake plenum which connects the FPR and decel valve which I will be restoring to factory configuration. I will be reconnecting the retard side of the can to the port facing the front of the vehicle once I receive my new vacuum hose that I have ordered. Once all that is done, the vacuum hoses will be routed correctly to EC-B configuration with no additions.