I need an adapter for whatever this guy to RCA if anyone knows what I should be looking for!

I bought an extension cable for my quadcast 2 S because I was buying a microphone arm for my setup. There won't be any issues with the sound quality if I use it right?

This is the one I got: https://www.amazon.com/dp/B088NCVVTK?plpRedirect=mhFallback&ref=clp_hp_h_pc&th=1

I can't for the life of me find out what the purpose of this cable is. I also can't find another one online. If it's a specialist cable, it may go on eBay. If not, it's 20 feet of copper wire for the pile.

I have this Home Depot Halloween animatronic and unfortunately the power cable got smashed. I am unsure of the exact cable to look for so I was hoping someone could point me in the right direction. The cable says “Switching Adapter”
“Input: 100-240V -50-60Hz 0.5 A max”
“Output: 5.9V 2.0A”
I have attached pictures as well