I think he's refering to the airbag, or SRS that should be in your seat....
One of the plugs may have been orange, the airbag one....
The battery should always be disconnected when playing with these systems, or there may be an unfortunate accident....! You may also trigger a warning light too, but not always. Another tip when playing with SRS plugs....if, like me, you tend to hold 'static', (i get shocks off everything..) i always wear rubber gloves...