You can update the sandbox client.
The update introduces changes to the 2.0 equipment. Servers open tomorrow, June 25, 16:00 CEST. Download sizes
SD client: 186.21 MB (265.51 MB unpacked)
HD client: 186.21 MB (265.51 MB unpacked)
WGC code to download the sandbox: WOT.SB.PRODUCTION@https: //wgus-wotru.wargaming.net