Where do they put the pins in accupuncture to help with insomnia?

It does not help. There really is no good evidence that acupuncture helps insomnia. If you sleep poorly often, and this is a persistent problem, then it is important to find the cause of insomnia and to treat the cause. Treatments can include cognitive-behavioral treatment that help you improve your sleep habits and get away from thoughts and associations that worsen sleep, or different kinds of medicines.
Ears. Ostly behind your ear lobes ear cartilage back of your ears also will check back of shoulder if its tense.
Ear & Scalp. The world health organization puts insomnia in the category of: diseases, symptoms or conditions for which the therapeutic effect of acupuncture has been shown but for which further proof is needed. Ear points can be used as well as the insomnia triangle on the front of the scalp.