Here's the detail pics on the gas strut install. I glued some 1x4 to the freezer body with construction adhesive. Then I used 3/4" screwss to attach the brackets to the wood. The struts were a bit difficult to install as they're 100lb struts and take a LOT of force to compress. I installed the bottom bracket, put the strut onto it, then had my little brother hold the granite lid up while I screwed it into the underside (the granite is mounted to plywood using a ton of construction adhesive and hinged to those big 2x6's in the back). The first time I put one on, it torqued a bit sideways and sheared off the screws so I had to be careful. Placement needed to be done so that the struts didn't torque sideways when closing.
If there's any other questions on the install, please ask. It was pretty easy to do, really.