Just did my countertops and had new double sink installed. The new sink drains are not centered as before, but offset. The installers took out the old one before I could take a picture of setup. The old setup had the garbage disposal installed on the left side. With the plumbing that is in place now I assume I should mount the disposal on the right and the outlet of the disposal should point down and fit into the opening on the pipe that points up. The horizontal inlet that's on the pipe that's connected to the wall should connect to the pipe that is laying on the ground (on the left side) and the other end of that pipe will connect to the sink strainer. The dishwasher pipe will hook up to the inlet on the garbage disposal. Is this correct? I've seen some setups where the garbage disposal is connected on the side inlet and the other drain connected on the top portion. Any difference here between these setups? I visited my local Home Depot to get some fittings to fix up the plumbing and the guy working in the plumbing department showed me a "Garbage Disposal Installation Kit" (picture attached). He informed me this had all the pieces I needed to install my garbage disposal and sink drain and dishwasher air gap. I just need to clear out the old tubes/pipes that was coming from the wall and start fresh. The old pipes that I had there were ABS, but this package is all white pipes (PP material). Is this a good route to go to start fresh and change the whole pipe types or should I just use the exsisting pipes and see if any extra connections are needed and purchase those and stay with the ABS material.