To create an FSG report from Database instance "UAT" to instance "PROD" (import the report).
The COA setup of both instance should be the same.

Only one step needed :

From GL Super User, navigate to (N) à Setup à System à Database Links

Specify the below,

Database	UAT
Connect String	(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP) (HOST=192.168.10.139) (PORT=1522)) (CONNECT_DATA=(SERVICE_NAME=UAT)))
Domain Name	WORLD
APPS User Name	APPS
APPS password	apps (use your password)

Done, You could try to import the FSG report from UAT instance to PROD instance

Note:

The connect string is the same connection string taken from client's (e.g. your PC)  tnsnames.ora file