Your engine bay looks pretty clean. You don't need to cover anything if you're not anticipating using a hose. (you won't need a hose for your engine)....
I'm not familiar with the CD2 kit, but once you get it clean. Dress the rubber hoses and plastic parts with a Plastic and Rubber dressing of your choice. (Including black wire loom)....
If the CD2 kit involves spraying your engine, cover the electronic ignition and alternator.
You're lucky because you are starting with a fairly clean engine.