I have a Xtant 404m amp and need suggestions on how to mount this amp. It is not like a regular amp that has 4 tabs to screw it down. If you look at the picture i attached the amp has 4 holes from the top of the amp to the bottom, so it looks like i would need 3 inch bolt or something to moun it. Anyone familiar with this amp? I can not locate anywhere online to purchase mounting hardware for this specific amp. any help or suggestions appreciated.