I won a power antenna off of eBay (from this auction) and it arrived in the mail today. However, when I went to install it, I discovered I don't know how to wire it.

This is the antenna:



This is the only free connector I could find in my trunk, near the RF cable:



As you can see, the power antenna has a dual rectangle, three spade connector. The only free connector in my trunk, the one I presume is for a power antenna, is T-shaped, with two metal spade tabs.

Will this antenna work in my car? How do I go about installing it?

I don't understand why the connector is different, unless what I've grabbed is not the right power antenna cable. The power antenna was purportedly removed from a 1989 (same year as my car) 240 DL sedan--I believe the seller, and don't think that this is a 740/940/something else antenna, because he was selling simultaneously a 240 dash switch that had to have come from a 240 and not any other car.

Finally, why are there three wires? Is one a ground wire (black?), one a live wire (solid red?), and one the radio power wire (red/green?)? How would things be done with "my" connector, which only has a black and a green wire?
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'89 244 GL -- 111,474 miles (see profile for info on car)