how do I power the Wav trigger board with 5v?

I have a 5v 10amp power supply in my project, and It would be conveniant if i could use it to power the Wav Trigger board, but where can i safley connect it to the board?

the robertsonics online user guide states that " You can also power the WAV Trigger by supplying a regulated 5V to J8, pin 4, provided you are not using the barrel connector. " but I cant find out which pin it means by “j8, pin 4” .

please help =)


/mike