I bought some dust collection bags for my 12 gallon Ridgid Wet/Dry Vac. I'm having trouble connecting the bag to the vac. It looks like they are suppose to connect right behind the hose inside the container. Apparently my vac is a few years old (less 10 yrs), but it doesn't appear to have the right piece to connect to. Is there an adapter or are these bags made to connect to newer models? The lady at Home Depot said they would work with all Ridgid Wet/Dry Vacs. Any help would be appreciated.