Ah, I just saw mention of the 2A ACC fuse in the owners manual. I think this is a mistake. It is not mentioned in the service manual, nor is it shown in the wiring diagrams. Also, I can guarantee my sled has no such fuse in the electrical bag above clutch cover, where it’s stated to be. Wouldn’t be the first error I’ve noticed in the ‘22 Matryx RMK owners manual.
Also, disregard my earlier mention of plug on the right rear overstructure (another error, I’m guessing a relic from the trail manual), that plug is in the connector bag.
There are a number of connectors all on the same ACC circuit, including: RCA ACC, ACCENT LED (both in bag over clutch) and ACC (on the hood harness). I just verified this on my sled with a multi meter. I’m 99% positive there is no other fuse on this circuit other than the 10A in the main box.
If I understand your post correctly, you’re seeing power on the ACCENT LED plug, but not the RCA ACC plug. Sounds to me like damaged wiring or connectors.