Do I still need to keep/lock chicks in the coop for 3 days if the run is smaller?

I recently got 4 chicks: 2 White Leghorns and 2 Jubilee Orpingtons. They are about 5 weeks old now

I'm not super crafty, so I ended up getting a Producer's Pride Hill Country Chicken Coop. I also put it up on cinder blocks to get it a little higher off the ground. I know pre-fab coops aren't ideal, but this is just a temporary setup until I can build or buy something better in the next few weeks. I am in the process of getting a run set up, too! Just wanted to get that out of the way first lol.

So my question is:

Do I still need to keep them locked in the coop for a few days when I move them outside, or will they naturally figure out where to sleep? The run isn't very big, so I'm wondering if they'll just instinctively go into the coop at night or if I need to "train" them that it's home first.