The first image is a picture of guy ropes. That is my precedent. The link to the amazon is https://www.amazon.com/Coghlans-8295-Guy-Ropes-Pack/dp/B0000AUSDG. 

 The second image is PVC pipe connectors. They are different types for different angles. Those pictures are also my precedent.  The link is https://www.amazon.com/Coghlans-8295-Guy-Ropes-Pack/dp/B0000AUSDG.