It's not hard, but if you don't already know that, you probably shouldn't do it yourself.
drill hole in dashboard, install outlet in hole, and run two wires to the battery
It can cause a danger if the outlet is yanked or has the metal of the wires exposed. It is best if the outlets become secured properly as soon as possible.
The green ground wire should be attached directly to the junction box. That is the metal housing where the house wires enter the outlet.
On what? IS this an outlet or a switch?
Just firmly connect the wires under the screws and that will couple them. Each outlet has two hot and two neutral screws; just connect the wires appropriately and make certain that the outlet is properly grounded.
It is an outlet that has one hot wire, such as a household receptacle, or two hot wires, such as a dryer outlet (in the US). If the outlet has three hot wires, it would be called a 3-phase or polyphase outlet. These would normally be found only in an industrial setting.
A 120 volt duplex outlet is the main type of outlet for residential outlet system. The wires are typically white and black, and there should only be two of them.
Wiring installation means that something must be connected to a remote power or control source using wires. It more difficult to install than wireless but can result in better overall performance.
A power outlet can be wired int a cigarette lighter. The wires will have to be cut, with the power off. Then the wires will need to be connected back together while adding the power outlet wires. The Connection will have to be a proper connection, preferably with crimp connectors.
Black, white, and copper.
Remove the breaker in main panel and either remove wires from main panel or cap off wires with wirenuts and label for possible future application. Put a breaker filler strip in hole left by missing breaker. At outlet you can just leave outlet or remove from wall and repair hole in wall. If you remove outlet and leave wires in wall it is best to totally remove wire from main panel.
A fear of wires, plugs or anything that can be plugged into a wall or outlet.