Tevo Tarantula - Power Box Adapter Extension

I created an extension for Elzariant's adapter since I could not fit my wires into the tiny space inside.
I also added ventilation holes as I got the newer power supply that requires them.
This is a very novice design, since I'm not that good at 3D modelling. Glue is required to attach it to the original adapter. I've included the .skp file for anyone interested to edit it in Sketchup.