2002 Saturn L200 access to horn contacts

Recently I had to slam on the brakes and hit my horn because some pin head pulled out in front of me in heavy traffic. Two days later while my saturn was sitting in my driveway the horn started blowing. I finally had to crawl under the front end and diconnect the wiring to the horn to get it to stop.

my thoughts are that I may have damaged the contacts in the steering wheel. However, I can't seem to find a release mechanis to get the cover off to access the horn assembly.

can you offer advice or instructions to help correct this problem? (Inspection sticker expires at the end pf this month)