I welcomed the new Second Bike to the garage

[Grumpy Goat]

I'm guessing the 5A limit is common now due to most vehicles having CAN Bus.
If your heated gear has a coaxial connector you can buy a short coaxial to SAE cord and plug into the charge cable.
Powerlet makes about any adapter you need. Coaxial to SAE, Coxial to Din, SAE to Din, ect.

Yeah, I thought about that for the past 3 bikes and never bothered. Pigtail is likely cheaper than the Powerlet adapter although over 3 bikes it may have been a bad decision.