I designed this enclosure for the FYSETC E4 in Fusion 360 so that it can also house the BME280, with its temperature/humidity sensor facing outwards for more accurate ambient readings. I also added a physical mount for the DS3231 RTC, so it can be fixed directly to the enclosure instead of being left loose.
The wiring was done with 10 cm female-to-female jumper cables, which work perfectly. For the motor connections, I used GX16 connectors

Note: the BME280 I used is the 5V version, which has a slightly different form factor.

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Below are the links to the components I used:
P4 conector: https://pt.aliexpress.com/item/33041079377.htm
Power Boton (Latching): https://pt.aliexpress.com/item/1005006090350341.html
BME280 (*5V): https://pt.aliexpress.com/item/32912100752.html
Fysetc E4: https://pt.aliexpress.com/item/32912100752.html
DS3231: https://pt.aliexpress.com/item/1005007143596890.html
Jumpers: https://pt.aliexpress.com/item/32825115359.html
GX16: https://pt.aliexpress.com/item/1005005075616252.html
M3 Allen bolts (8-10mm Lengh... At least 10unit): https://pt.aliexpress.com/item/1005004667739632.html

FysetcE4 Wiki: https://onstep.groups.io/g/main/wiki/32747