[amsat-bb] th-d72 using external speaker?

hi folks, starting to get the hang of this new radio. Is there a way to use an external (power) speaker?. i have the smc-34 speaker mic that came with the unit and cannot just plug the mic jack in my itself is there some kind of adaptor like a pigtail to seperate the mic and speaker jacks? any help appreciate. 73 de VE6ITV AScott