In an
internal combustion engine, the
distributor cap serves to keep the
wires in place between the
electrodes of a
distributor and the
spark plugs.
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"
-Moxy Früvous