1975 Datsun 620 PCV valve

I have recently installed the pcv valve on my 1975 Datsun 620 truck, and I can say I was a bit confused. I thought the pcv valve (for some reason) was located right on top of the valve cover of my engine (L20B). I tried to remove it and found out it was an empty tube. I was shocked. I did a little bit of research online and found out that this thing is located below the carburator. Please take a look at the picture below. It is pointing to the PCV valve which has a rubber hose attached to it fastened with a clamp. It is hidden.

I removed the hose and exposed the valve. You can see me turning the PCV valve with a wrench here:

I bought it at Autozone, and the part number is PCV1142