Reddit reviews Absolute USA SPL2218R 22/18 Gauge Scotchlock Quick Splide Auto-TAP Connectors

You can save some money, and get a better fit, by using this to power the A118C: http://www.amazon.com/gp/product/B00L3XXRI0/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

As for the connectors, I used this style: http://www.amazon.com/Absolute-USA-SPL2218R-Scotchlock-Connectors/dp/B00M6J4B1W/ref=sr_1_11?s=automotive&ie=UTF8&qid=1426009973&sr=1-11&keywords=tap+connector (get them from an auto parts store or Walmart... you only need 2, and get the red style as that is for smaller wire)

I just hardwired an A118C into a Trailblazer last night, using power from the wires going to the OnStar mirror... The A118C is on the windshield behind the mirror, the little power supply is double-side taped to the back of the mirror, and I tucked the excess USB cable length into the headliner. It's all black, so it's still a fairly stealth install, despite all that being out in the open.

Fuses are good, and I wouldn't trust the higher amperage fuse that's powering Homelink / OnStar / whatever to blow when something goes wrong with a lower amperage circuit like the dashcam or its power supply, but in my case both components are right in front of my face and are controlled by the ignition key. If it has an issue, I'll pull over and turn the key off. If the electronic parts themselves were behind or very near a combustible material (like a headliner), then I'd use a fuse.