Electic Antenna ?

So I got tired of looking for / piecing together the original antenna, but I did get the original bezel that covers a big hole on my fender and with any luck it will work with the electric antenna I have coming.

I am keeping the stock radio so there is no blue wire to hook up the antenna to, so what do I do? I do not want an extra switch.

I was thinking I could take the radio apart and try to figure out how to hook an additional wire, just not sure if that is an option.

Any ideas?