Load and place families in a family dynamo

Hi everyone!
I’m trying to load and place multiple families (generic models) into a curtain wall panel family. I need to place them at the intersection between 2 main ref planes. I’m a first-time user and I can’t really get the logic behind Dynamo so I hope you’ll be patient.
I found this dynamo script but it’s not working for me. Has anyone ever done something similar? Is it even possible? Thank you very much