Another thing that is great about this setup is that the battery is outside of the camera. As most DSLR has issues with heating up as their batteries aren't really made for filming and using that much power the batteries heats up after a full hour of filming back to back or if you are filming in a hot area. But with this setup the battery first is outside the camera and enable to cool down better, but also these large Sony NP-F970 are build for large ENG cameras and can handle the power output much better without getting hot.
The other setup would to mount it onto your shoulder via a 15mm rail block clamp like the image above. If you are lucky the rail block can sometime be found around 10 bucks but often also be sold around 20bucks. But another affordable option would be using the rail block from the affordable $15 matte box.NP-F970 battery plate this is where the battery will be placed to power your camera. I have chosen this version as it have few extra quirks making it better than other one but also being quite affordable. This one actually made to power a lilliput monitor but it also can be used to power LED lights and more. The great thing about this one is that there is a lock, so the battery would not fall out easily.
Another plus is that there are allot of mounts on this battery plate, from plain veclro to attach to anything to a small L bracket seen on the shoulder rig setup above, but also standard 1/4" scew hole giving you tons of option to mount it anywhere you want.
Then you have the DC coupler or the Dummy battery. The one I am using is for a Canon EOS 550D/T2i but can also be used for 600d, 650D and 700d. But there are other DC couplers you can get for other camera, but the important thing is that it should have the DC female plug end to plug the battery plate cable into.
And ofcourse to power it all you would need a battery. These NP-F970 are currently quite affordable and able to pick up some nice 6600mAh for around 20bucks. But great thing is most lights and monitors use these batteries, so standardising everything to use the same battery is all the better. Then having tons of different kinds of batteries in your bag.
Parts list:$14 -SONY F970 Battery Plate adapter
$20 - Sony NP-F970 battery 6600mAh
$15 - DR-E12 coupler for EOS-M
$24 - LP-E8 DC Coupler Lanparte for 550D/t2i, 600D, 650D and 700D
$39 - LP-E6 DC Coupler Lanparte for 5D3, 5D2, 6D, 7D, 70D and 60D
$20 - DMW-DCC8 GH2 Coupler for Panasonic GH2 and G6
$15 - DMW-DCC12 for Panasonic GH3 and GH4
$1 - DC plug adapter to connect the coupler to the battery plate adapter
$15 - Matte Box