What are you trying to plug in? That port is primarily for emissions control, and of no use on a Tesla car. You can get power there, but that is about it.
If you _really_ want to use the port, but can't fit your plug, then simplest may be to get an OBDII extension cable.
P.S. Not sure what a 'regular' OBDII plug is. I've seen left hand right angle, right hand right angle, straight variants, and a large number of different body sizes. The plug connection is standardised, but the cable and housing arrangement is not.