These are for use with the side lit variant of neopixels. Soldering wires to the copper pads of the tape generally results in the copper pads being torn off with any force on the wire. There is also a spot for soldering on a inrush limiting capacitor if it is at the start of a strip. The trace on the signal line can also be cut to add an inline resistor to reduce ringing.
Side Lit Neopixel Breakout Boards
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