A secure antenna chassis access for an information handling system reconfigurable antenna may comprise a chassis enclosing the information handling system including a top cover, and a rear chassis wall, an antenna mounting insertion slot within the rear chassis wall, a reconfigurable antenna grounding bracket with an internal mounting portion configured to mount internally to the chassis via an internal fastener, a hardwired antenna operably coupled to a Wireless Local Area Network (WLAN) network interface device of the information handling system via an electrically conductive wire to transceive data at or above 6 GHz frequency, the hardwired antenna operably disposed through the antenna mounting insertion slot of the rear chassis wall from the interior of the chassis and coupled to the reconfigurable antenna grounding bracket internally mounted to the chassis, and an antenna security cover enclosing the hardwired antenna and removable by internal access to the chassis.