Connecting PCV for the first time…is this nub at the back my carb where I’m supposed to connect it?

The main reason for using an electric vacuum generator is that engine vacuum is too low to operate the booster. Does the engine have a sizeable cam?

You should hook up the PCV & see if it works. The carb jetting etc is designed to get about 3 cfm of airflow [ at idle ] from the PCV. If it does not get that 3 cfm, t/blades [ or some other means ] will need to be open further at idle, upsetting the T-slot/idle relationship.

To test PCV: connect to carb port, engine idling, remove PCV. Pintle should be pulled IN, not moving. Moving/rattling means insufficient vacuum to operate the PCV. You can buy an expensive adjustable PCV orrrrrrrrrrr get a 3/8" bolt shank, & cut off about 1/2" or less; drill a 1/8" hole through it. Push shank into PCV hose.