Ignition feed to switch on a bonnet relay

I'm trying to tidy up a little my accesory wiring (currently it's all connected directly to the battery through individually fused wires). The idea is to have a thick wire from the battery to a strong relay which will be switched on by the ignition, and then another thick wire from the relay to a fusebox, and then from the fusebox to the accesories. Something like this:

I've read Martin's wiring diagram and saw an "Ignition relay" powered from the battery and turned on by a feed from ignition, but no more details. From where does this ignition feed arrive to the bonnet, in order to switch the relay on ?

Thank you.

The cigarette lighter socket uses an ignition live, you could run a cable from there through the a grommet in the bulkhead to the engine bay.

That is one option, I'm sure someone will know of a better ignition live already in the engine bay.

The cigarette lighter is actually an accessory live, the first click of the key.
It powers the radio and cigarette lighter.

This might be better for the OPs purposes, it will go off when you crank the engine as well.

I thought about the cigarette lighter indeed, but was thinking to use that for something else. There has to be a spare fuse under the bonnet, on which I can piggyback ...

Well, had a little time to research this today ... this cleared up my question:

Suzuki makes some kick-ass manuals, my hat goes off to them. Summary: there's nothing controlled by the ignition under the bonnet. From the big fuses in fusebox #1, two wires go to the ignition and then to fusebox #2 inside the cabin.

Another possible option found: use the blower/fog relay. Connector E132 (flat, 8 pins) is just good to get a nice relay command from inside the cabin by mounting a switch next to the mirror adjustment switch. Command from the dash switch comes to connector E132 on pins 6 and 7 to the relay, and you get a positive signal on pin 8. This is sent further through a green wire to connectors E161 and E162 (2 pins, rounded) and then to the fog lights. Should be just good for mounting two spotlights up front.

I would have thought that the wiper motor has an ignition live.
I can't remember if the horn works all the time or with the ignition, if it is with the ignition you have another possibility.