First order of note: The branch SRX Series do not support all of the Layer 2 switching features supported on the EX Series.
Have you enabled and committed ethernet-switching on any interface as yet? I am not sure at this point if ethernet switching options is supported on the SRX. I did not get that from your post.
Since you are already under the hierarchy, Ethernet-switching-option secure-access-port ?
Just use the question mark. If you type show, it will only show you what has been configured already but not what can be configured. You could also enter set ? to see the available options.
I will do a little ore research later