You're correct - on your model the programming port is on the front and the back jack is for an external speaker. I have the same one. Apparently, when they first came out, there was only one jack and it was on the back - for programming only. And that's when all the online reviews and guides (
www.miklor.com, etc.) were written. Then, they put out a revised model that put the programming port on the front and a ext. speaker port on the back - plus added a fan. A very confusing design choice, in my opinion. It's a great radio, though.