The Clipsal brand sits on top, and you will find that it does not interfere with the wiring space at all.
2 PCS 12VDC 35A 4 Pin Micro ISO Automotive Relay 871E-1A-D-R1 U15 Switch
You will find that the unbranded design things basic, which makes troubleshooting quick and stress-free for most setups.
I like how the NVX label is printed cleanly, so it does not look cheap or faded over time.
The model shown is DEK-OE- 12DC/ 48DC/100.