What is the other 12 pin connector go to normally? If that is an Airmar 12 pin mix and match, you would need see if they have a 12 to 12 pin adaptor. That 12 pin is obviously not the 12 pin Furuno connection or anything we sell.
Checked with Airmar and they do offer a MMC-12F. Thanks for sending me in the right direction.
Can you tell me where I find out what my tzt12f's current software version is?
The software shows at the bottom of the screen during boot-up but you can also get full software details by running the quick self test of the unit. (Home - Settings - Initial settings - Quick Self-test [near end of initial setup menu])