89 Bass Tracker Pro 17... Q & A

So i just bought my first boat. A Bass Tracker pro 17 1989. I have had a great time restoring it for the past week. I only have three questions that I am hoping someone can help me with.

1. (In the picture) what is this wire i am holding and where does it go? It has a 5 pin connector on it.

2. On the throttle and up near the front (on a small panel) there are tilt/trim buttons. They are not working. Since they are there...This would prob mean that the boat is equipped with tilt/trim...RIGHT? I mean i have looked for a small motor around the (what looks to be) hydraulic arm on the transom but couldnt find one. Keep in mind i dont really know what im looking for either.

3. How do you fill the livewells? Do they just fill up up if you take the plug out? Stupid question I Know.