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How to use a scosche car stereo wiring adapter? - stereo wiring

I have a 2001 Dodge Dakota and just bought a new stereo system. It is common for the power, if I all the cables for the adapter. There are two yellow son to use one of the stereo adapter (the connection) and use anothe which provide both power and not share where the yellow seconds. The instructions say to use another yellow card in the adapter to take, but there is no yellow. Please help me.