I think the silkscreen for the diodes in this kit may be incorrect. My guess is 2 need to be reversed? They are LM317 regulator kits from Ali. : r/diyelectronics
AKOAK 15amp Diode Axial Schottky Blocking Diodes for Solar Cells Panel,15SQ045 Schottky (20Pcs): Amazon.com: Industrial & Scientific