Comedy translation from (I assume) the original Italian on the box the horns come in.
Installation of the horns is simple, apart from finding the right nyloc nuts to fix them to the studs in the steering rack chassis mount. No need for drilling holes like the 420 builders. The right nuts can be found in the Miscellaneous Fixings pack 20P012A (of course). Thank you Andrew Bissell. Similarly to Andrew, I also needed a breaker bar and my trusty vice to free up the 13mm nut in the centre of the horn to allow alignment of the connections for the wiring with the wires themselves. Now, just a bit of cable-tidying to do and a decision to make whether to follow Andrew’s lead on filling the upright plastic electrical connectors with silicone.