I once owned a Star Sapphire III and still own a Triplanar. I believe the topology of the Cosmos is identical to the SS. Your answer is no. It won’t work, because the VTA tower on the TP gets in the way. I’m sure Mijostyn will chime in. TP now offer optional longer arm wands, 12 inch might work. Maybe TP can modify yours. The routing of the cables is not the problem; they just go over the top of the deck.
As I write this, I’m wondering whether my memory is playing tricks. The TP won’t work on a Technics SP10 mk2 or mk3 for the same reason, and maybe I’m confusing my experiences with SOTA vs Technics. Like I said, Mijo has more recent experience.