I have the Haynes Manual for VW Golf Apr 89 - 2000 (R to X reg)
The list of relays does not mention electric windows or central locking - Relay 8 controls Terminal 30 from which I assume these things get their power.
Central Locking is F6 at 5A
FR37 30A on the relay plate is for both Central Locking AND electric windows.
Peccavi, March 2009