For the key on switch can I use the picture below, it is called, add a circuit, This is what I have my remote wire connected to, in the ACC fuse holder slot, with an additional 15 amp fuse. So two 15 amp fuses in this circuit. Would this cause an issue, or should I just splice into a key on switch wire, preferably the ACC wire in the back of the fuse block.

 

cigarette lighter is the easy one under the fairing.
What year and model bike do you have?

 

I have a 200 Road King Classic, I don't have a cigarette lighter, I don't have a front fairing.

 

I used a fuse block tap when I had speakers on my 05 heritage. Tapped into acc on fuse block and never had an issue in 9 years. Just make sure amp only has power when ignition is turned on