Location of battery isolator & relays in '04 gulfstream 5230

There is an overall lack of standardization in the RV industry. However, I used to have a 1998 Gulfstream and it did not have a manual battery switch or disconnect. It did have a solenoid for charging the coach battery under the hood on the driver's side. It looked exactly like an old-style Ford starter solenoid (which is probably what it was). Your coach may be completely different, but hopefully this info will help.