Radio antenna wont plug into head unit

[BadMan03]

Cannot plug aerial antenna into head unit tried buying an adapter but did not fit to the end of the antenna:confused:

[Southie]

Welcome to PNG, what headunit did you buy? Also what connector did you get??

[marc69]

pics will help

[brainsnova]

Does it look like this

http://i517.photobucket.com/albums/u331/Brain_missing/06B42A92-6495-455F-B95E-113DA87D5869-2150-000001514FB8AE8F.jpg