any other questions just ask, there are no dumb questions and you're smart to ask cause that speedo isn't cheap. On most radios they have the wire for the memory that requires constant 12 volts in yellow so you don't confuse what red wire goes where. You might mark that wire with yellow tape or get yellow shrink tube so you'll know which wire is which if you ever have to do any work on it or wiring in the area.
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