How can I use Package offline upgrade from SAE4.00.06 to Secure Connect Gateway 5.10?

Dear All

SAE:/ # cat /etc/esrsclient.conf
BasePath=/opt/esrsve/
ClientServiceName=**************
ConfigurationType=**************
GatewaySN=**************
HttpsListenerServiceName=**************
KeyConfigPath=/opt/esrsve/gateway
ProxyServiceName=**************
Version=4.00.06.00
WatchdogServiceName=**************
ContainerEdition=4.00.05.30

Our SAE not allow connect internet ,so I must use Upgrade Package for Policy Manager 5.10.00.00  offline upgrade , but I not find any document solve the problem . how can i do ?