Your theory is good! It will work! Just dont know how comfortable will be to rotate the gold nut on the QR if around it is the metal of the from mounting plate! But that can be setup easily!
If you hold the wheel base vertically like this, you can remove these bolts(which are holding the motor):
View attachment 848016
without misaligned the motor inside the box and then you can put front mounting bracket under the motor:
View attachment 848020
and front hard mount the wheel base with longer bolts.
This is just a theory and it may not work!
If anyone's crazy enough to try it, keep me updated.