How to pack with axolom Argos packer? Strap help?

Hey, those of you that pack with the axolom Argos packer what strap(harness) do you use for it? Do you even use a strap?

I currently have a cake bandit jockstrap but I feel that it bends the packer in a weird way so I don’t think I want to use it for this packer

Any tips or ideas?