you have to construct URL to application hap_main_document with application configuration hap_ac_main_doc and 3 parameters:
APPRAISAL_ID
MODE
plan_version
http***/sap/bc/webdynpro/sap/hap_main_document?sap-language=EN&sap-wd-configId=HAP_AC_MAIN_DOC
&APPRAISAL_ID=0050569D0CDC1EE48FFE611A62AC9175
&MODE=X
&plan_version=01