SO the longer tube in the jar connects to the tube from the diff and the other connects to my old vacuum cleaner, which I keep in the garage, and which has a garden hose as suction end by default. This garden hose fits just nicely over my aluminium tube. Note that I use 2 more cut offs of the antenna as adapters and as shown above I widened up the tubes again with the long nose pliers and the heat gun to make the tube fit over the aluminium pipes.