For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon_2204/15.6/home:interstar001:Centreon_2204.repo
zypper refresh
zypper install centreon-widget-grid-map
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon_2204/15.4/home:interstar001:Centreon_2204.repo
zypper refresh
zypper install centreon-widget-grid-map
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon_2204/15.3/home:interstar001:Centreon_2204.repo
zypper refresh
zypper install centreon-widget-grid-map