Which file do you see with key. Is it Access Gateway Appliance ?
If yes then follow the link:
You will install the Admin Console and IDP as service. For this purpose you will use choice of OS(RHEL/SLES/Windows) and then install the service. The OS upgrade in this case is your responsibility. However, AG appliance bundles OS with AG service. The OS and security upgrade is provided through update channel and you need to register the product using Key.
AM_45_AccessManagerService_Linux64 -> not required
AM_45_AccessGatewayService_Linux64 -> not required
AM_443_AnalyticsServerAppliance -> You need to use 453 HF1 Analytics Server Service( https://www.netiq.com/documentation/access-manager-45/install_upgrade/data/b1mv97jz.html )