Placement for Piezo Pickup

Hi all, I’m about to embark on my second dulcimer build - an elliptical 20” vsl with a pine (softwood at least) 1.5inch deep body. The body won’t be very wide - at most about 6” at its widest point. I’m planning on installing a piezo inside but I’m not sure where it should go. I’m thinking on the melody string side of the sound board but I’m not sure?

my first dulcimer has a 26” vsl with a large box (12” x 26” x 2.5”) body and I’m really pleased with it but I fancied making a “backpacker” instrument (not that I ever go anywhere!) :)

What do more experienced builders think?