Here's how I did mine recently, based on info I found here...

This pic shows the installation of the double sided base strip, the light strip, and the end of the light strip, near the porch light by the door.

This pic shows how I actually did the porch light itself, something that I've found missing for pics of what was actually done. I ran the line from the LED lights to the connector for the control box. The control box is the white thingy (technical term!) in the upper center. The black plug and line out the right side is where I did my splice, with enough wire to allow for error. When I did the splice, the sheath revealed a white wire and a black wire inside. Using the 1156/1141 adaptor I ordered through Amazon, I simply connected the black to black wires, and the red to white wires, using wire screw nuts.

The end result. And it worked the first time! For me, that's quite the accomplishment! I have no need for the porch light now, it's wired in to the switch just inside the door and it will now work whether I have an electric site, running off the battery, or running off the TV. I took my time in doing it, took probably 45 minutes start to finish.