Making a tool holder: how do you attach HDD magnets to plywood?

I have a little experience in this type project. Earlier in a thread called Tips, Tricks, and Tools I posted a pic of my tool holder that I use all the time, a Shell oil can with HD magnets stuck on the inside. It works great for screwdrivers, wrenches, pliers and other small tools. If you use sheet steel, you can just stick them on the back side no problem. If you really need to use plywood, I'd suggest stacking the magnets. Remove the backing plates from them and stack them for better pull through the wood. They add power up to four stacked magnets, then the addition of another doesn't help much. You'd be amazed what you can do with a stack of four of these. I used my stack of four to hold full thickness Progressive Farmer magazines to the fridge. Any of the glues suggested should be fine to hold them to the plywood.