I'm sure this has been asked in this or another of the thousan HF tool box threads, but I don't have time to read through 85+ pages, and the GJ search function isn't the greatest. Anyway, how are the top and bottom boxes supposed to be attached to each other? There didn't seem to be any hardware to do so, although I did see holes in the top of the bottom box (didn't look to see about the bottom of the top before I lifted it on.
Right now I've got the one sitting on the other, and while I'm sure once there are tools to weigh it down it might be OK, I'd rather not leave that to chance (particularly here in earthquake country).