This adapter here will convert your 6-pole round connector that's on your tow vehicle to a 7-way blade connector on trailers. That is to say if your pickup has a 6 round pin connector, and your trailer has a 7-way blade, then the 6 Pole to 7 Pole trailer wiring adapter is the correct adapter for you.
Tips:
Color coding is not standard among all manufacturers.
A heavy duty flasher may be required to eliminate rapid flashing.
Always unplug boat trailer connector before backing trailer into the water.