Distributor hose routing help

Well I think I'm about to show exactly what an auto novice I am, but I've looked and looked, and decided to "suck it up" and take my vacuum advance question to the group. Yes, that was a HORRIBLE pun.

I have a 73 dart custom with 225 slant and all those glorious early emmisions control devices. I went to check the timing, and found that my distributor vacuum line was severed. (Although the car feels like its running fine) when I did a quick search for the routing I found this diagram for 1975 that shows two hoses coming from the distributor. The red hose to the nipple on the air cleaner housing next to the hot air intake, and the black to the vacuum port on the holley 1920 carb,. However mine was only setup the "red route" to the air cleaner.As I said I am a novice at this, and I'm wondering if I'm supposed to have some sort of "t?" Is it routed properly? (Minus the severed hose of course.) Fill me in guys. Is that just a '75 and not a '73 thing? What am I missing here?
20180418_072526-jpg.jpg

These are not two hoses, rather one or the other
If you have the OSAC then you plumb it as shown, otherwise use the black routing. I recommend to bypass that OSAC, if your engine doesn't detonate routed that way