I don't have that platform, but I will throw out a general solution that has worked great for me and can probably be mod'd to work with any pack and platform.
I got a bunch of those bungee cord loops with the ball end. You can remove the ball, shorten the length of bungee, girth hitch the loop to a pack, etc.
On the back of my pack, I have loops of bungee girth hitched (with a twist to lock it) to daisy chain loops on my pack. They are about mid-pack height and one loop on each side. Down farther, I attached the bungee cord loops on each side but left the balls attached and shortened the the bungee loops. I then wrapped the bungee cord plastic balls with vet wrap.
I can take either of my platforms (predator or tree suit) and place between the bungees and take the longer ones and lash over the platform and then latch to the bungee balls below. It is on there tight. I can climb up the tree, reach back around the pack and disconnect the platform to hang it without ever removing my backpack. It is also incredibly fast to pack up, just stretch the cord and let go.