You can append url parameters to set a wrapper based on the security category and wrapper id.
You can determine these id's by going to Setup > Page Wrapper Editor > Searching for the particular wrapper and determining the id, by clicking manage and viewing the pw_id number in the url.
Similar steps will result in determining the security category id number. Setup > Security Categories > Searching for the particular security category and click the name. In the url category= will provide the number.
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