This reminds me on the first version of my very first build
I wanted to save money and use the same battery for longboard and mountainboard. In the end I sold everything including MTB and switched to Trampa.
Yes it’s ugly but the main reason why it’s not a good idea is balance. I got speed wobbles very early and it felt very strange in general to have weight at the rear truck. The riding experience was bad.
Then I mounted everything underneath the deck and got no more speed wobbles and much better feeling with the weight between the trucks. But I had to top mount the trucks and add risers, that sucked a lot compared to drop-through. My wood enclosure was huge
If you use a fiberglass enclosure which is not too deep you should be able to keep the board low to the ground and if you touch something it won’t break.