Each input of the Zoom H5 has to be configured differently when connecting lav mics. In this tutorial I step you through each of the settings you need and explain why some adapters can destroy your expensive lav mics.
Zoom H5 Recorder: https://geni.us/Zoom-H5
Stereo Input Splitter Cable: https://geni.us/Stereo-to-Dual-Mono
Rode VXLR+ Adapter: https://geni.us/Rode_VXLR_Plus
Standard XLR to 3.5mm Adapter: https://geni.us/XLR_to_3-5mm_Minijack