There are some YouTube videos on how to do it. You have to lean the plate forward at least 45 degrees then move forward and up until the center hook on the plate engages the center pin. Once the pin is fully engaged then rotate (curl) the plate back to engage the other two pins. Sometimes, you might need to shake the implement by hand to align the lower pins. I had to reverse the bolts/nuts that secured the lower pins in place to provide some more side to side clearance on my LP grapple. It still beats pinning on the implement.