At this point you want to pop the storage boxes in half, all it requires is some pulling and you can get them apart.
This is where you start adding the L Brackets to your speaker to secure it to your storage box, the 2 in L Bracket attached at the rear of the speaker because it gives me a little more room to play with when installing the speaker, then the 1 in bracket I attached on the front of the speaker for reach purposes. Make sure to measure where your holes go or drill in holes with the speaker pushed inside the box and the brackets where you want them and then install your machine screws head on the outside so the shank doesn't interfere with re-installation of your box. Run your wire straight through the drain holes in the back half of your box and attach them to your speakers and at this point everything should be completely hooked up so do a quick check to make sure all your speakers are working correctly and that your toggle switch works to turn the speakers on and off.
Get your Hardware Wire and cut it, I was able to cut mine with scissors and I cut it twice as long as the box folded it over on it self to provide a more solid barrier to keep someone from breaking through to steal speakers and then painted my own design into it (Paint is great regardless of whether you want it to be more personal or just one solid color to provide rust resistance, painting all the hardware especially in highly corrosive environments is very important) (Double Black Diamonds is a Skiing symbol for those who don't know)
Secure the Hardware wire onto the boxes with your Screws and Giant washers and do it so the screws go threw both the storage box and the truck bed in order to prevent someone from just walking up pulling the speakers out and walking off.
Because the Hardware wire doesn't look very good I threw in some plexiglass, you can get a sheet at homedepot
for like 5 bucks, it is very important you take your time cutting the plexiglass down to size, if you rush it you could cut to much and then you would have to start all over. I cut it down to size with a glass cutter also at home depot for like 5 bucks. I made sure I cut it a tiny bit bigger then what would be required. At this point I filed it down to fit as close to exact as possible and used some clear silicone adhesive to seal it in, eventually I am going to paint it black so you cant see the speakers at all but wanted to give you a chance to see it clear and installed.
Thats my write up, comments are welcome, so are questions just let me know... Total cost for everything to do this came in right around 200, I bought most of the expensive stuff on EBay
to save me money.
The speakers I used were:
POLK AUDIO DB461P 4X6" 300 WATT 2-WAY CAR & MARINE AUDIO PLATE SPEAKER, I got them on Ebay for 62 dollars, Polk has them listed on there website as 130 dollars i think.