Here's a step-by-step on how to install a hardwire kit and dash cam on a Mazda Miata (2006-2015):
** Product links **
Dash Cam Adapter : amzn.to/4aVI2Gq
Dash Cam Adapter for Homelink Mirror : amzn.to/3LDAG14
Garmin Mini 2 : amzn.to/3KCLIlH
SD Card : amzn.to/3R7VFvR
Reach out to the good folks at Dongar Tech if you have more questions regarding compatibility!
dongar.tech/