OK I'll cop to not being all that mechanical about bikes. Just upgraded to a new FLHRC. Lovin' it. But ... there's a plug in the back, next to the left saddlebag that I can't ID. What is it? (No laughing!) It's right next to the plug to attach a battery tender. Pics attached.

 

Data port for ECU

 

Ah. Thanks. I was hoping it might be something I can use to plug in some heated gear. But I won't be trying that with it.