Where are you wearing the sensor on the arm band?

I know for the wrist band it suggests wearing it on the outer wrist. I have struggled with the wristband because I have tattoos on both sides on my left arm, and quite significant scarring on the outer wrist, but find it doesn’t read very well on the inner. And on the outer wrist on both arms it doesn’t seem to read well no matter how tight or loose I wear it.

I got the arm band and I am in the same situation, my left arm is not an option because of tattoos, my inner right arm has a tattoo, and then the outer arm has some severe scarring so there is 0 chance of it reading. I wear it now above my tattoo on the inner part of my right arm, like in line with my elbow ditch. It is higher than I would like to wear it. And sometimes I accidentally realise its been pressing against the side of my body. It also has to remain in a super specific place.

Anyway, does anyone know where the suggested placement on the arm should be? I wonder if it can be worn on the back on the arm? Sorry for the ramble, I wish I had more freedom for placement. I’d wear in like between the inner and outer if I could but that isn’t a possibility. I am just intrigued to know how the majority wear it!