I bought a 12 foot aluminum boat that will mostly get used for family recreation and a little fishing on a 400 acre lake. The previous owner decked it out with a lot of bass fishing equipment that looks to be a decade or so old. In the attached picture of the stern, I recognize the paddle wheel speedometer and the transducer, but what is the thing that the wires run to before they run in to the hull? (The other holes are for inlet/exhaust for a live well which I'll probably remove). Second question + second picture ... if the Eagle fish finder pictured works, is it worth keeping/selling or is it junk. (It seems petty old). This is my first post. If I've overlooked any of the forum's etiquette I apologize.