Have an Ender 3 PRO, upgraded to 4.2.7 board, metal extruder, glass bed, and BLTouch. My BLTouch had the 5 pin connector. Surprizing that there aren’t more videos about how to set up this combination! It took many many many tries with Visual Studio Code until I got it to work. The difficult part now is to get the first layer to stick to the glass bed. Am also trying a glue stick.