The plug in the bottom pic is for the brake/tail light. Black is ground, White is stop light and Violet is running light.
FWIW, the four single leads are for the turn signals and the other plug is for the signal flasher relay.
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'15 YAMAHA WR250F, '75 YAMAHA TY80 Gone: '00 380 EXC, '03 EC300, '07 YZ250, '07 250 XC-W, '08 YZ450F, '12 CRF250R
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