Well, I was gonna send a picture but mine has the single cable. You sent me down a bit of a rabbit hole but apparently the dual cable is an older design. Given your quad is parts from a bunch of different years my guess is someone swapped the carb over to a newer style. You can get a single cable to clean the mess up a bit and either hold or sell the dual cable, as they are discontinued and quite expensive (15$ vs 70$ new)
Edit: re reading your old thread I'm thinking somebody swapped a complete 1997+ model year motor into your older chassis and did the bare minimum effort to make it work. It explains the different carb and stator, as well as so many things being bypassed.