That's a good mounting position for the inverter, out in the open with easy access.
A cautionary tale to why I no longer will fit an inverter in a concealed or hidden away. I had a well known green 1000W inverter develop an internal fault and when I powered it there was a bunch of sparks and smoke and the inverter continued to do this until I disconnected the power supply. This was on a trip in a remote area of the Northern Territory. The inverter may of suffered from vibration or had a good knock, I don't know.
I have always fitted high current devices into a vehicle with a quick very accessible disconnect device like an Anderson plug or isolator switch, and in this case it was a cable with an Anderson plug, this is what prevented any other damage to the vehicle. The one thing people forget about with inverters is that the 12V DC supply fuse needs to be a high enough current rating to allow the inverter to be useful however if there is an electrical fault internally on the DC side this fault may not draw enough current to cause the fuse to fail but will continue to draw enough current to destroy other components or generate enough heat to cause a fire.