Are these following three places from the Sunnah: a) The nape of the neck (al-Kaahil), b) Between the shoulder blades (Al-Akhda’ain), c) Top of the head (Umm Mugheeth)?

These are from the main points for cupping and they are reported in the Sunnah. Cupping is performed wherever it is required, such as the top and bottom of one’s back, the middle of one’s shin, or the back of one’s heel.