Is it a bad idea to mount my secondary fuse panel on top of the relay box?

Advantages: easy access, shortest input and output lines.

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Disadvantages: Need to disconnect when I need to reach the relays. Risk of mounting hardware interfering with components inside, or falling off.

The box is safety rated for engine compartment installs.

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Alternate location: on the fender behind the relay box. There are preexisting holes, but I lose acces to two circuits and it’s a bit close to that other doohickey.

I could also go to the far side of the engine bay and pass through a different grommet, but that means running my power line across the top of the radiator, which I’m trying to avoid.

What do you suggest, Oppo?