Secure centerboard

Just bought a 14.2. While trailering it home, the centerboard came loose and dropped causing the road to grind away about a 3” corner by the time I got home. Couple questions….is it sailable with the centerboard missing a corner?
Second, the centerboard mechanism is confusing me a bit. Having a hard time seeing what the proper way to secure in the raised position and why it’s not swinging freely…sticks pretty noticeably going both directions.
Thoughts?
Thanks in advance.