Disassembling and cleaning free space 51 outdoor speakers

Is it possible to disassemble the free space 51 enclosure. I was able to remove the speaker but not the top. There is dirt and moisture in there that I want to clean out but cannot figure out how to disassemble further.

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

crwdns2934109:0crwdne2934109:0

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