Me, personally, would not worry about fixing the wiring terminals. They could have been done better but I wouldn't hesitate to fly it like it is nor would I worry about asthetics. Your photo's show what I have seen as typical assembly. Sure, I have seen nicer and worse...MUCH worse!!! One of the last Kitfoxes I looked at was an absolute mess. There were huge blobs of solder and exposed wires all over the place behind the panel. I honestly have no idea how the plane was ever given a sign-off and AW certificate. Yours actually looks decent compared to all those I have looked at.
Could you post more pictures of the complete plane? I have been in the market for a year for the right deal/plane. I sold my Super Champ on floats and have been looking for a decent Kitfox ever since. Hate to have all that money stuck in the bank drawing 0.0000001% interest when I could be flying and spending money on gas.