Our innovative customers Peggy and her husband purchased two WindowKitty® window cat seats and installed both into her larger window. They were able to connect two together using two - 2" long nylon bolts and nuts. They then used a nylon spacer before they put everything together. They drilled two holes in the uprights and connected them with the nylon bolts.
Brian and I have several different thoughts for a connector for WindowKitty®, but are not ready to pursue a connector due to the cost of product design and tooling. We are hoping to develop a connector in the next few years that can add that extra space to one product for windows larger than 33.5" and of course attach two products together for even larger windows.