The LCD will need the cable modified to fit the SKR 3 motherboard. Four pins, tx2-pa10 rx2-pa9 gnd-g 5v-+5v, ( See the boards silkscreens for pin labels)
These are configuration files for the Ender 5 Plus to work with a BTT SKR 3 motherboard using the stock LCD with A4988 stepper drivers.
The stock LCD needs to be flashed with a custom LCD firmware available from https://github.com/Desuuuu/DGUS-reloaded/wiki/Flashing-the-firmware