You probably are missing 2 thick wires on the drivers side and 2 thick and 2 thin on the passenger side. You have 2 options for the thick wires. Run additional wires to the fuse box or run everything from the current thick power/ground wire. I did this and have not blown a fuse yet. On the seat side of the wiring, connect the thick red wires together. Then connect the thick brown wires together. That will get everything power. Lumbar and side bolsters are on a different fuse.
I used posi taps to connect the thick wires together.
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