Sometimes it feels like all the headphone adaptors run off together for a secret meeting - just at the moment you really need them to be there for you.
If yours has disappeared, grab another one. This takes a mini stereo phone plug (3.5mm) and turns it into a stereo headphone jack (1/4")
Grab two, and leave one in your glovebox, just in case.
Connector(s): 3.5 mm TRS to 1/4 in TRS