I keep it in the little slot pocket that is on the back of the bino harness it definitely doesn’t interfere with anything. It’s a half face blades feather lite so it’s on the smaller side for fixed blades
I attached an ESEE in a hard sheath + MOLLE back to my Alaska Guide Creations Kodiak KISS Max bino harness in the vertical orientation on the right-hand side. I found 2 suitable attachment points: MOLLE on a loop up top, and the lower drawstring around a smaller loop on the bottom. It works well, doesn't move, and I forget it's there until I need it. I tried to capture both the overall look of the harness as well as a detail of the attachment points in the photos.