To remove the throttle cable, unscrew the top of the carb. The throttle cable is attached to the top of the carb and attached to the slide. There will be a large spring inside the carb between the top and the slide. Pull up gently to remove the spring, slide, and jet needle. You can then set the assembly aside to pull the carbs. You will also have to remove the fuel line from the carbs, and be aware that the float chambers will be full of gas; if you tip the carb upside down, the gas will come out and make a mess. Have a pan ready.
To remove the choke plunger, unscrew the plunger mechanism at the carb body. There is a small spring holding tension on the plunger. There is a chance that the cable end can come out of the plunger, which will allow the plunger and spring to fall off, therefore falling directly under the engine, never to be seen again by mortal man. Forewarned is forearmed!