This V2 is for adding a low voltage relay. (Electronics-Salon 6PCS 3VDC SPST-NO 5A/250V Power Relay Module. DC3V.) found on Amazon
V2 is the same as V1 the only difference is it has a channel for wiring and the space for the relay.
Category: 3D Printing
The author marked this model as their own original creation. Imported from Thingiverse.