No questions are dumb... The extensions are for mounting and reference points on the CNC machine. They get cut off only after the last of any secondary operations are complete. The jack goes inside the notch facing the player so if you use a right-angle jack, it simply falls down towards the ground without having to loop it through the strap and it will not come out if stepped on. It also still allows you to stand the guitar on the two strap buttons and lean it against a wall or a couch or a chair without a stand as The_Patriot mentioned. If you use a straight plug, it aims it up to the strap for easy looping. Also, it is easy to find on a dark stage without messing up the finish of the front of the guitar hunting for it. There is a reason behind everything I do when I design something.