I'm trading out the stock radio for an aftermarket unit.

My idea is to add an extension to the stock Nav radio GPS antenna so that I can use the stock GPS antenna with an aftermarket GPS unit. So, I'll need a coupler to connect the stock GPS cable to an aftermarket GPS cable/unit.

But, I don't know the name/type of connector used on the stock and so I don't know what to look or ask for when I go to companies that supply connectors and adaptors.

I've attached photos if anyone can help.
The first two are with the black plastic piece that holds it to the back of the radio. I then removed the plastic piece for a better look on the next two photos. I also attached a photo of where it once connected to the radio.