Installing Lync 2013 CU 4

Hi,

I am not sure how to do thi correctly. I have Lync 2013 coexistence environment with Lync 2010.

I have Lync 2013 enteprice with HLB, i.e two FE servers two Edge servers , one persistence chat server and one bacend server. All db are on sam SQL server and on default instance. It is the Install-Database etry whic is confusing me.

 I am not sure which option to use.

I think I should use this 

Install-CsDatabase -ConfiguredDatabases -SqlServerFqdn sql.local -Verbose
and the this
Install-CsDatabase -DatabaseType PersistentChat -SqlServerFqdn sql.local -SqlInstanceName default -Verbose
and finish with
Enable-CsTopology
Is this correct?
thanks.

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