That is how you connect 2 batteries in parallel. Like terminals are connected together. With this arrangement you still just have 12 volts, but the amperage doubles. You should also see the 2 positive terminals connected together. If not, then you may have a combination of parallel and series.
Connect the positive first and negative last.
No
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 connecting battery cables, always connect the positive cable first, which is typically red. Attach it to the positive terminal of the battery, then connect the negative cable, usually black, to the negative terminal. This order helps prevent sparks and reduces the risk of short-circuiting. When disconnecting, reverse the order: remove the negative cable first, then the positive.
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.
negative
Black is negative and Red is positive.
When connecting jumper cables to a car battery, attach the red cable first before the black cable.
ALWAYS, ALWAYS, ALWAYS connect the (+) cable FIRST. The reason it sparked was the ( - ) negative cable was already connected.
The black one is the negative.
Normally the black battery cable is negative.
The red cable is the positive and the black cable is the negative. The positive post is slightly larger.