Using 2x M2 washers and 2x M2x8 button head screws mount the X Endstop on the rear late above the upper belt. Make sure the endstop lever is facing down

At this time, the endstop has all 3 wires connected. You will not have any reason to use the middle wire and if connected wrong it can short the endstop plug shutting off the printer. Since we don't need it, cut the red wire and discard

The original design has the BLTouch mounted on the rear of the carriage using 2x M3x6 button head screws to secure the mount to the Rear Plate.

Secure the BLTouch to the rear mount with 2x M3x8 button head screws and 2x M3 nuts

I have designed an optional variant that moves the BLTouch to the front of the X Carriage. You can find the files in the FYSETC Modified Printed Parts folder on my Github

Secure the mount to the Front Plate with 2x M3x6 button head screws

Secure the BLTouch to the Front Mount with 2x M3x10 button head screws and 2x M3 nuts