Bom list:

 level knobs m3 x4pc 

the latches.

m3x30 x4pc

 m3 nut x4pc

 m3 t-nut x4pc

 spring 4mm x15mm x4pc (from pen)

 m3 brass insert x4pc

 super glue ore locktite 

Installation: Add the insert in the latch. Screw the m3 nut on the m3x30 to the end. Add the knob on the bolt. Add the spring on the bolt. Put the bolt with spring in the latch. On the end of the m3x30 bolt put some super glue ore locktite to secure the t-nut. Put it to getter and let it dry

let me now what you think