Our Miramar is the same way. At some point, I'll go in and clean it up - probably when I'm troubleshooting something or installing solar. Regarding the Orange and White wires, I agree with The Gritz Carlton - I tracked down ours and I recall those being the colors I found. The wires should be 10Ga, which should be stamped or printed on the side of the wire (in case you didn't know already).
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