+1. The Beneteau 361 has them too (though I don't use it; simply place them in one of the two lockers)should be a two-track bracket in one of your cockpit lockers next to the bulkhead. A bungee cord retains them. If you don't have it, you can create it.
They are one of the crew's favorite upgrades. They absolutely hated hauling out the hatch boards at 3am when someone needed to race for the restroom, or even on cold nights when at anchor. I love the interchangeability of the inserts for different times of year.They look really nice. I like the way they just fold onto the sides of the companionway.