The cache is located just outside Integral Energy's Parklea Zone Substation. Upgraded in 2001, the substation houses three electrical transformers that are fed via 132kV underground cables from the Rouse Hill Switching Station (across Windsor Rd from The Fiddler) and output 22kV feeds supplying the surrounding neighborhood.
Despite the signs near GZ, you should not encounter any physical danger while searching for this cache. The closest street parking can be found on Clarendon Dr just in front of the display village. GPS accuracy may be affected by nearby electromagnetic disturbance, however you should be able to locate this cache using your geosense. Traffic on Sunnyholt Rd can be quite heavy, so timing your search is critical to success.