No instructions are provided, but to install in an unmodified van, there are 4 bolts holding the latch on from the back and 2 cables that easily attach to the cam on the back of the latch. You will need to grind away a bit of metal on the back side of this latch to get it to fit. This latest latch version is very similar to the original but has a metal cam and should last longer. The original latch is no longer available. Also check the operation of your cables and the plastic glides on the slide mechanism.