Trying to figure out where to place players 7v7

I have a team of U12 girls and I’m struggling where to put a couple of the girls. I play 2-3-1. I have a couple girls with a very high motor that I like to keep for striker because they can run for days and are very aggressive.

The rest of my girls are all pretty versatile, with the exception two girls who play pretty lazy. Almost no energy, they wait till the ball comes to them and they kick it away. It’s rec, and I’m working with them to improve this in practice. Definitely want to give them as much playing time as everyone else. In the meantime, I’m struggling on where to put them where they are the least liability to the rest of the team. Advice?