From the looks of the picture, I would say, if you did decide to free the chick.... I would go up and to the left. Away from the blood vessels, with an aim to take the cap off.... But like you said earlier, it is generally a last resort kind of thing.... but I have done it successfully more often than not, once I learned not to wait too long.... of course, with an EMU, who knows what is too long.... but like others have said.... pay attention to the vigor of the chick.... if it looks like it is winding down or not moving, I would break it out. Sometimes it does not take a lot..... a couple of bites out of the shell with a tweezer and that bird might be able to finish the job.