Rocker switch holder

I already have a model that holds one large switch. Now I've made a control panel for the sockets in my garage. It can hold three switches. 

There are two groups of three models. There are three models with rounded corners and three with straight corners, and they either have no holes for the wires or one or two holes. 

In models where there are no holes, you can choose the locations yourself and use "subtraction" in orca slicer when slicing. 

I used PETG. The fill is 25%. The supports are automatic tree-like. 

I'm just learning modeling and making simple models. They may not be fully optimized for printing, but I always conduct strength tests. I'm satisfied. 

If you have any suggestions, please leave them in the comments. I want to get better!