Under Seat mount for a Ducato based RV

I made this model to mount my DC/DC charger which charges the secondary LiFePo4 battery of my RV from the alternator. 

At the moment the model only has 2 5.5mm holes to be used with brass M4 inserts but I will add more holes later on to fit other stuff like MPPTs and Busbars to it as well. 
The final .step and F3D file will be released later on as soon as I made it fully Parametric so you can just change the hole sizes and distances via a table in Fusion360.