How do I reassemble the refraction lens?

I changed my lens, and part of the internal refraction assembly just fell out. Part numbers 3 and 297A. I don’t know how to repair this. can someone help?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0