Could someone please point me in the right direction?

I just purchased a Terk Q powered FM antenna to get better FM reception
in my office. However, there is no means of hooking up the device to
my antenna directly. The antenna has a hookup that looks like a
coaxial connection, but without threading (cylinder with a post). Does
anyone know of a way or can anyone come up with a way to hook the
antenna to my "boom box", which has the standard telescoping antenna?

I appreciate any and all help you can provide.

Thank you.

--Dan