My configuration provides this configuration type of situation:

 $Self->{'AuthModule1'} = 'Kernel::System::Auth::LDAP';
    $Self->{'AuthModule::LDAP::Host1'} = 'ldaps://172.200.100.121';
    $Self->{'AuthModule::LDAP::BaseDN1'} = 'dc=ict,dc=test,dc=com';
....

 $Self->{'AuthModule2'} = 'Kernel::System::Auth::LDAP';
    $Self->{'AuthModule::LDAP::Host1'} = 'ldaps://172.200.100.120';
    $Self->{'AuthModule::LDAP::BaseDN1'} = 'dc=ict,dc=test,dc=com';:
...
 $Self->{'AuthModule::LDAP::Params'} = {
        port    => 636,
        timeout => 120, (if i modify this value nothing change)
        async   => 0,
        version => 3,
    };
...