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.
On what? IS this an outlet or a switch?
It's possible that the outlet is on a switch, and either one half of the outlet is switched or the whole thing. The extra two pair of wires probably feed the NEXT outlet.
connect your black wires to the right side of outlet on the gold screws white wires on the left side silver screws and bare copper wire to green ground screw.
The green ground wire should be attached directly to the junction box. That is the metal housing where the house wires enter the outlet.
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.
The wires going to a GFCI outlet are no different than a standard outlet. I assume you are wiring the fan switch to the same wires and not actually to the outlet itself (this would mean you are plugging the switch into the outlet and that wouldn't make any sense).
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.
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.
Black, white, and copper.