Some new connector info.....
Went to the auto store in the "Help" section as per Jep's suggestion about looking for two individual connectors instead of one. Well his suggestion paid off, as I found a vacuum elbow that fits perfect, IMO. They only had one, so I will try another auto store tomorrow.
My main question was whether to Goop or not to Goop???
After finding this elbow and the way that it fit, I am probably not going to use the original connector. Now if I couldn't find anything, then using Goop would have been the solution...
This elbow fits perfect and you have to twist it side-to-side to pull it off, that's how good of a fit it is. The one end fits on the solenoid completely and the other end holds the plenum and canister lines very tight. The only thing I might do is cut down the elbow to the lines, but I may not have to.
I can almost guarantee that the plenum line (at the solenoid "original" connector) which gives so many trouble on plenum installation with coming undone could and will be a thing of the past.
Although the original connector is thicker, one of the holes has become elongated and therefore would need the Goop as Phil suggested...
For $2.99, you can't beat it...

the new and the original....just need one more...notice the RS hole on the original, it is slightly elongated as mentioned. The line actually slides in and out of that hole. This is where the Goop would solve that problem with the original connector, if yours is like mine...

here you can see one end installed onto the plenum line...see how the new elbow expands, the plenum line is not going anywhere....

connected to the solenoid, a good tight complete fit....IMO, this is the way to go.....