Rear View
  .1/  Power switch
  .2/  Video in/out ports (model-unique)
  .3/  Modem/fax port
  .4/  Microphone/line-in jack
  .5/  Headphone jack
  .6/  Option cover
  .7/  Power jack
  .8/  Serial connector
  .9/  Parallel connector
 .1ð/  External display connector
 .11/  Power shutdown switch
 .12/  System expansion connector
 .13/  Air duct
 .14/  Rear infrared port
 .15/  External diskette drive connector
    (Model-unique)
 .16/  MIDI/joystick port (Model-unique)
 .17/  Connector door
 .18/  Rear door
504 IBM Mobile Systems HMM