Replying to Mount point for Black Diamond Helio 105

I'll be mounting marker kingpins on my helio's and have honestly no idea where on the ski they should be. I'll be touring around norway for a season, and possibly a trip to japan so a lot of hardpack(?) with some deep mixed in. I have been skiing for around 16 years and have a lot of all mountain and experience, but touring is fairly new to me. I like sending off of cliffs and doing nosebutters in pow if that helps at all.