Pipe Fittings from 3dWarehouse

Hi everybody. I am new to SketchUp and trying to do DIY small plumbing project. Please help to understand how to connect these fittings from 3D Warehouse: https://3dwarehouse.sketchup.com/model/u2609b1c0-811d-472b-9c8d-c6090df8d874/PVC-Pipe-Fittings
I will very much appreciate if you can give me a link to tutorial or explain how to. I am using SketchUp 2014.
Thank you

Start from here: https://learn.sketchup.com/track/sketchup-fundamentals-part-1, and learn the basics of SketchUp, Move tool and Rotate tool