I've got a few disconnects in my shop that have a place to put a padlock or ??? to keep the cover closed. NOT to lock out the disconnect itself (I know what that's for) but to prevent access to the inside. I've just put zip ties on them in such a way that you can't open them without cutting off the zip tie, but I'm guessing that's not the real way to do it. So what is? Are you really supposed to install a padlock?