Hello. I've outfitted two Outbacks with a large 20" x 26" kill bag from Reliable Fishing Products (great product, very well made).
This is easily mounted on the bow if you don't mind hiding access to the front hatch. What I did was install two padeyes along each side of the bow, aligned with the attachment points on the fish bag. I then attached small 5"x2.75" 304 Stainless steel carabiners to the attachment points on the bag, which I can then quickly clip on and off the carabiners. I also use a larger carabiner to attach the front handle of the bad to the carry handle right at the very tip of the bow.
With this installation, it's simply to zip open the bag and slide fish in or out. It's worked like a charm on both my old 2016 outback and my newer 2021 outback.
https://reliablefishing.com/collections ... -kayak-bag
It ends up installing very similar to this. If you look closely in this image (this is _not_ me, I just found the image online) you'll see little rings at the bottom of the bag. On my kayak I connect those rings to padeyes I installed right below them, using small carabiners
I use the YakAttack snagless slotted padeyes; they're very low profile which I like. Be sure so use silicone under them when screwing them in to maintain a water tight seal.