Antenna to Head Unit connection

[toddro]

Hello,

I have replaced my factory unit with a Blaupunkt Heidelberg CD51. The round silver plug on my antenna lead is too big to fit into the hole on the back of my new Blaupunkt. This is not the antenna power lead, that works fine, but the plug that provides for reception.

Should I be looking for some type of adapter or is there another work-around for this?

Thanks,

toddro