Fingerprint/home button pops out after screen replacement.

the home button on my OP5 doesn’t stick to the front panel, after i changed it, and i cant find any adhesive. how should i keep it locked in place?

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

crwdns2934109:0crwdne2934109:0

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