Consider one of the many modules for M5Stack - "PROTO" (Fig. 1). Buy it now on Aliexpress
Figure 1. The PROTO module is composed of base and finishing modules
This module is a plastic gray frame, which has means of screws circuit Board with one connector 2 to 15 (Fig. 2, 3).
On the frame on the right side (Fig. 4) there is a recess under the sticker (not included) and a cavity under a flat-blade screwdriver for easy removal of a module, because due to connector 2 of 15 modules are kept pretty tight. Left side there is a plastic grille (Fig. 4). Top and bottom three holes (Fig. 5).
Designed this module to create your own extensions for M5Stack.
Figure 2. View of module top
Figure 3. The module on the back side
Figure 4. The module side
Figure 5. View of the bottom module
You can download additional materials from GitHub the link