Actually there are several different hookups. Like hunting leopards in tall grass, you never know what is going to popup.
I try to keep up with what is out there.
When you are pecker deep in a friend's dash trying to help him install his new radio, its not very confidence inspiring for him when I look at the connector and say, "what the heck is That??"
The things I do in my life seem to run in cycles. I have not had to help anyone install a new radio in a couple of years. So its about due.
Had to help a friend out with some gun-smithing last week, first in a year or two.
And just this morning, I heard about someone trying to restore an old Coke machine. Since I am a pretty good expert on them, I suspect I will get sucked in on that one too.
So, I'm glad you reminded me about the different style connectors. I need to refresh my memory on them.
I know Kia, Volkswagon, and several others all use different hookups. But, I have heard of a few more.
I have one of these beasts in my Duramax.
I wanted just the small to big adapter, but couldn't find it.