I did my daughters 90 190E 2.6 not too long ago and if I remember correctly, that black bezel just unscrews. It has nothing to do with the two little holes in the tumbler.I think I used my thumb and fore fingers of both hands 90 degrees off to each other. If it's really tight, the fingers may not be enough.
Once its off then comes the wire in the tumbler. I left a deposit equal to the cost of the tool with a mechanic at an indy shop. I have a hunch that the paper clip wont be long enough to do the job.
If you have access to a Haynes manual for the 190E 2.3, I believe it goes through the proceedure.