The location of ISP pins can vary slightly depending on the motherboard revision. The diagram below shows the most common location for the LG K41s mainboard.
If you want the exact ISP pad labels and a boardview for your specific LG K41S motherboard revision, tell me whether you have the board's model number or upload a clear photo of the PCB around the charging port and test pads; I’ll identify pads from the image.
: Long wires can cause signal interference or "CMD Timeout" errors.
Power off the phone completely. Remove the back cover and disconnect the battery flex cable. This is crucial to prevent short circuits.
: Desolder the BGA 221 eMMC chip and place it in a socket (like an Easy Jtag or Medusa Pro socket) to read/write data directly.