Change Embedment Depth of the Doweled Bars and Apply the Force per Dowel

I need to check an existing wall - new slab connection using doweled bars. I am using the "Extensions" type of concrete-to-concrete connection.
1- How can I change the embedment length based on my requirements?
2- How can I change the force per meter length to force per dowel?
Please refer to the attached image.
Thanks