Besides your plaque and stake, you will need a drill with a 1/4" drill bit, a large cup of pebbles or sand, a screwdriver, 2- stainless steel screws (1 1/2" long), 2- washers, and 2- bolts.
Center your plaque as best as you can onto the top part of the stake
Insert your pencil tip to mark the position of the holes
Drill the marks all the way through
Insert stainless steel 1 1/2" screw into plaque then into stake hole. If screws do not go in easily, use the screwdriver or go back and make the hole a bit larger to fit snug
Add the washers and bolts. This is what the back should look like.
Dig a hole at least 8" deep and twice as wide as the width of the stake (about 4" wide). save the dirt and grass.
Insert stake in hole and level while adding the pebbles or sand. Pack it down tight so there is no movement.
Pack down the saved dirt and top with grass. Enjoy.