Fist the red thing is not the oil pump . It's just a fitting too plumb the cooler .
The pump is in the motor , and I don't have a clue how to hook up one to a 6.5 . You motor has a fan on the flywheel and doesn't need a cooler . In fact my motor in question really doesn't need it either for normal riding . If one was to ride for hours in heat then it would be needed , but they lock cool .