Typically a ground cable on automobiles is black but don't assume it's correct without checking because someone may have replaced a black cable with a red (or any other color) cable.
When used on a car, a black cable is negative.
black cables are negative
The red cable is the positive and the black cable is the negative. The positive post is slightly larger.
Red cable to positive, black cable to negative.
On a vehicle the red is positive (+) and the black is negative (-). If they are not color coded the cable connected to the starter is positive and the cable connected to the engine or chassis is negative.
Red/positive cable to red/positive cable. Black/negative cable to black/negative cable. The battery is under the cover in front of the air cleaner.
Black is negative and Red is positive.
Red is positive. If they are both black then the cable that is connected to ground is negative and the other cable is positive.
I assume you're asking how can you tell which is positive and which is negative? The red cable is positive in the black cable is negative. But if they are not color-coded the positive battery post is slightly larger than the negative battery post. If you try to connect the negative cable to the positive post it would be a tight fit and if you connect the positive cable to the negative post it would be loose.
It should be RED, the Black is the Ground or Negative.
The black cable is the negative or ground. The red cable is the hot or positive calbe.
Red, positive + cable to Positive + battery terminal. Black, negative - cable to Negative - battery terminal.
red to positive, black to negative
Normally, yes. The positive + post is larger than the negative.