Map column with spaces in the name to the variable name

<?xml version="1.0" encoding="UTF-8"?>
<scenario>
     <name>Map column with spaces in the name to the variable name</name>
     <script>map_fields_with_spaces</script>
     <sources>
          <source>
                
               <name>excel_worksheet</name>
          </source>
     </sources>
     <destinations>
          <destination>
               <name>excel_worksheet</name>
               <load>
                    <variables>
                       <NAME field="Long field name with spaces" />
                       <THE_FIELD field="Another long field name with spaces" />
                    </variables>
               
                    <sql>
                       update sometable 
                       set field = 'N'
                       where some_field = {NAME} and some_other_field = {THE_FIELD};
                    </sql>
               </load>
       </destination>
     </destinations>
</scenario>