You need to be more specific. Do you want the tabs themselves to move to a different position or do you want the entire tabset (the container) to move to a different position? You can adjust tabs using TabSet.setTabBarAlign(Side.RIGHT); See javadocs and http://www.smartclient.com/smartgwt/showcase/#layout_tabs_align, if you want to adjust the container then you can add these two lines to your code:
wrapper.setWidth(580);
wrapper.setLayoutAlign(Alignment.RIGHT);
wrapper.setWidth(580);
wrapper.setLayoutAlign(Alignment.RIGHT);
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