Cryogenic phonon-scintillation detectors for dark matter direct detection and other rare event search experiments require reliable, efficient and robust photon detectors that can resolve individual photons in a scintillation event. The nature of these low background cryogenic searches also presents various challenges to the cabling system. In this talk, I will report on a cryogenic detector module containing a scintillating crystal, equipped with an NTD-Ge phonon sensor and a photon detector based on a low-temperature photomultiplier tube (PMT) that is powered by a Cockcroft–Walton generator (CWG), as well as the corresponding semi-flexible laminated cold cabling system.