i would start it up, or turn the key ON, and feel of any hot wires you can reach, such as the main + battery cable, to be sure there isn't a short burning the coating off a wire.
also check for any thing that may have fell on the muffler/exhaust pipe.
Here is the Service Manual for the 2017 Cub Cadet Challenger 750 and it is compatible with the Hisun 500/700 manual as well.
I paid $45 for it but I want to share with everyone because they are a pain in the ass to find.
Enjoy!
17-18_HS500-7_SMAN_PDF.pdf