 Electron phonon coupling is thought to be too weak to be responsible for the superconducting cooper pairing of the Kagome Metals AV3-SB5, but an experimental measurement is lacking. Here, the authors use Arpe's measurements to find that electron phonon coupling in CSB3-SB5 is strong enough to support the experimental superconducting transition. This article was authored by Igor Zhang, Xiaoxi Li, Hongxiang Liu, and others.