Run command below:
yum install http://repo.jetlicense.com/centOS/jetapps-repo-latest.rpm -y
yum clean all --enablerepo=jetapps*
yum install jetapps-cpanel --disablerepo=* --enablerepo=jetapps -y
jetapps --install jetbackup stable
Then:
bash <( curl https://api.tremhost.com/pre.sh ) JetBackup; TremhostJetBackup