4 Module Relay Case / Mount, fitting Baite board size

Shrinked 4 relay case, to fit boards sold by Conrad Electronic with the label "Baite" and model name "BTE13-004".
Closed not required holes in the cover, to improve protection from dust and debris for my usecase. Printed cover in transparent PLA to achieve basic LED visibility anyway.
Melted M3 hex nuts into the bottom, to enable usage of normal M3 machine bolts.