Its 14 gauge 2 conductor black low volt cable.Sorta like the cable you get from low volt outdoor lighting kits.
We install a 6"x6" j-box in basement and run all our cabinet homeruns back to it.We install a 300 watt or sized to your job indoor transformer in box and switch leg a 110v. switch.
The cable for the mini track has to be located to come into the back corner of your run of cabinets.the 3/4" lip that is under the cabinet.If i could draw on forums i would."lol".
Its just really a nice product and perfect for this application.The look is awesome.It also comes with a fascia trim piece to help hide track even more if needed.