Sherrie, the yellow substance you see is a close up view of the end of a new section of hose (in this case tygon) AVB has cut into a tapered shape (pointy) . That wire is inserted through the oil filler hole and threaded through the small port that the old hose came out of with the stiff section of wire attached as shown in picture. Before doing all this, you fit the other end of this replacement cut to size hose over the internal tank filter nipple you pulled the deteriorated hose off of. Once you have successfully threaded the wire through the bottom port of the tank, you gingerly pull the new hose through, until the filter reaches the bottom port. You then gingerly pull the nipple section of the filter through the port until it stops and is self positioned. Needle nose pliers will assist in the last stages, but I advise you to cover the jaws with a layer of rag, to avoid the splined metal of the pliers from doing damage to the new hose. Phew! hope this helps you to conceptualise it!
