the red cable if there is no red cable usuallly the thicker cable is positive if that does not work look under your vehicle for the starter and fallow the thick wire back to your battery and that is you positive cable.
Red, positive + cable to Positive + battery terminal. Black, negative - cable to Negative - battery terminal.
There are typically two cables, one is usually red and the other black. The black cable attaches to the negative terminal on the battery and the red wire connects to the positive terminal on the battery. When removing the battery from the vehicle always remove the negative cable from the battery first. When installing the new battery always connect the negative cable to the battery last.
Red is positive (+).
Red wire is Positive in a car battery. If they are not color coded, find which one is not connected to the chassis and this will be positive.
The big black cable goes to the battery and the starter . The smaller black with red stripes wire goes to the small terminal on the solenoid marked s.
You can connect the red wire from the USB cable to the red wire of the two-wire cable. The black wire from the USB cable can be connected to the black wire of the two-wire cable. As for the white and green wires from the USB cable, since the two-wire cable only has a red and black wire, you can leave the white and green wires unconnected as they are not needed in this case. Just make sure to insulate the unused wires properly to avoid any short circuits.
The main battery cable (red in color) will mount onto the large stud on the back of the starter solenoid. Piggybacked along with the main battery cable is the alternator wire (orange in color) Both wires are held on by a 13mm brass nut. The last wire which is purple in color mounts to the small stud on the solenoid, and is held on by a 9mm or 10mm nut.
The red battery wire goes on the positive + battery terminal no matter which side it is on. The black wire goes on the negative - terminal.
Red is usually battery positive.
The red wire and terminal on a 2008 Honda Civic are the positive wires for the battery. The black wires and terminal is the negative battery cable.
When charging a battery, you should always connect the red cable first before the black cable.