Good latch?

Tracy

TMI WARNING: I'm a ftm and have been wondering if all this time he's been latching wrong. I have a birth defect called pectus excavatum and it makes my boob on the right side a bit sunken in and my nipple smaller, so it makes it very difficult. His mouth does cover the whole thing but I still worry if it's not enough. Please let me know and if there's a way to fix it.