[GenX Porsche]

Ok so this is the most simple question but I want to make 100% sure before I go and screw something up. I recently got my CIS system rebuilt on my 1973.5 2.4. Now thinking that it would only take an afternoon for my mechanic to get to it I didnt label the fuel lines on the back of the CIS. So its 3 weeks later and I finally get my injection system back, well **** how do I put this back together. I found a diagram of the CIS injection system and it shows how it goes back in but I am not 100% sure about it so I decided to ask.
The only part I am concerned with, because I didnt label it, is that there are 3 nipples, 2 big single-ribbed and 1 small tri-ribbed nipples coming out the rear of the CIS, AS IT SITS IN THE CAR. Now what I understand is that the small tri-ribbed farthest left one goes to the fuel filter, the middle or left big single-ribbed one goes to the throttle body, and the right most or right big single-ribbed one goes to the return to the fuel tank. Is this correct? I would greatly appreciate it if someone could just go look really quick so I dont screw up my recently rebuilt CIS. Thanks alot. David