Follow the steps below to install a ThinMan Secondary Server with external Database:
Install the ThinMan Primary Server as explained in ThinMan Single or Primary Server Software Installation Procedure
Install the ThinMan Secondary Server as explained in ThinMan Secondary Server Software Installation Procedure.
Prepare the external database as explained in MySQL Database Configuration for ThinMan External Database: Dual Database Configuration
Setup the ThinMan Primary Server Database Parameters as explained in ThinMan External Database Settings for MySQL: Setting ThinMan Primary Server Database Parameters.
Setup the ThinMan Secondary Server Database Parameters as explained in ThinMan External Database Settings for MySQL: ThinMan FULL redundant configuration (ThinMan Primary and Secondary Server with Double Database).
Setup the ThinMan Primary Server with correct reference to ThinMan Secondary Server as explained in Configure Reference in ThinMan Primary Server to ThinMan Secondary Server.