Welcome to the forum!
I wasn't sure which series HiSun you had, but you can find them on the left side of this Parts page. you might can find it here. https://alpha-sports.com/hisun_parts.htm?q=hisun-parts
One thing i would think about before putting a new plug on, is what caused it to burn it out. Could be just a cheap part, or just time won the battle, or another electrical issue.
a regular 6 pin would more than likely work, but im not sure if the wires are supposed to go a certain way or not.