the blocks we have a lip where they are suppose to hook together. how do we stack these so they interlock and then lock the caps on them?
The hook does two things, it' locks the top block to the one below it and it backsets the top block a little bit which looks good and adds strength against the hydraulic force of the earth against the back of it.
To install, you lay your first course, preferably on a footing, but can be just put directly on the ground. The second course starts half a block to the right of the first, and so on to the top of the wall. Blocks can be cut in half by scoring with a masonry blade on both sides and then snapping it in half.