67 antenna wanted

Ok, well now that I have Dads cuda. Im trying to put on a correct antenna. Slowly sifting thru parts I came across his orig antenna(I think). So I went to an audio store today and got a male end, thinking that is what plugs into the antenna. WRONG!!
Here is a pic of what I pulled out of the orig 67 antenna. Can someone help with a pic as to what I need for the cable to attach to the bottom of the antenna??

Thanks
Steve