In an internal combustion engine
, the distributor cap
serves to keep the wires
in place between the electrodes
of a distributor
and the spark plug
It resembles the lid of a spray paint can, with one central hole on the top, and eight nodes circumscribing the the top, through which the wires pass.
"Down the line, coming down the line
A V6 Merc in blue
Without the sparks or distributor cap
I'll slap them on as it slides through"