The optional startAppParameters and endAppParameters arguments specify the start and end of a collection of command line parameters into a huge string array that is passed to the initialize method of the application being run.
All subsequent parameters up to the endAppParameters argument or the end of the command line are collected into a HugeStringArray and passed to the initialize method.
When you specify the startAppParameters argument, you must also specify the schema and app arguments in the jadclient command line (and optionally the executeSchema argument), as they specify the schema and application to which the jadclient executable does a jomSignOn call.