Not having a dash with me, I can't be sure - but I would have thought there is way to access the plug without having to remove the dash. What are you trying to do (ie upgrade to constant-on power with higher amp draw, tap into the power to power something else, etc) - we may be able to suggest other alternatives as well.
I don't know anything about your 100 but the cig lighter on the 80 is not the best source for power. The 80 cig lighter has a fusible link (of sorts,) is on a fairly small fuse, has a small gauge wire, and is switched power.
im am trying to power the switch on the fog light harness. yes it does have a relay and the fog light power is hooked up to the battery. the instructions say to hook it up to the positive wire going to the low beams, that way the lights will only be able to be run while the low beam lights are on. i want to be able to run my fog lights with the low, high, and no other lights on. thanks for the assistance