u/No-Pepper-8716

I have the 12v little tikes Dino dune buggy that I have modded to run on dewalt 20v batteries and it has been running great. My buddy (and I) thought it would be smart to wire it up for the greenworks 80v battery. Clearly not smart. A loud pop happened and now it won’t run. What did I break and what do I need to replace to make it work again? Thanks in advance