How to find those juggernauts in state of decay 2?

As with anything it takes time. Just continue to play and they will eventually pop up quite frequently. Usually the farther you progress in the game is the key usually.

They can be difficult to find. Honestly, it is a random spawn, but typically the longer you have survived the more common they will be. They are even more difficult to kill, I would recommend searching up a video on Youtube of how this is done.

On the higher difficulty they spawn all the time.

Haha it is possible to stun them over with a car and if you are lucky ram them again for the kill, the easier way is have your coop partner then run in for the finish, but cars are scarce and you will most likely destroy the one you use so it's not the best
method

Saying that, I love your gusto! Capture yourself doing it for me!

I have hit and stun two juggernauts at night with a car. I end up waste gas on a car for keeping hitting a juggernaut but i kill it with a another car. I end up blowing up the car by hitting the second juggernat but i waste all bullets and arrows on the
second juggernaut, killing it. Unfortunately i did not survive the night. Because i being attack by those pack of special zombies. I don't know what their name is but they are very fast and have great agile. They run with 2 arms and 2 legs. Juggernauts are
pretty dangerous while there a like ten zombies around juggernauts as a team. Chasing me. At night, is not safe.

You have to progress through the story a bit first before they appear usually, which gives you chance to learn the ropes of the game and gets you ready to fight them.

When you do fight them, use doorways that they cant "usually" fit through and headshots as body shots dont do much