Displayboards and Partnerboards will have holes for Mounting the PCB's Direct or you can use the Modular Casing system we have in development. Mounting hardware is up to you, (yay for screws! or even PCB board mounts). Its kinda up to you!
The Connectors are Actually the side headers that you see on the sides, they lock together with no cables required. Pre-made ribbon cables of a few lengths will be available through Kickstarter and Makertronic to do flexible applications. All Partner boards use the same connectors and are designed to just plug in the same way as the displayboards.