Looks fine, and you'll not damage the key switch anyway,
it is just a contact switch, the contacts inside will handle more current than the wiring.
If you can get inside the key switch to check and clean the contacts thats always a good thing to service while you are doing the elecs anyway.
At least you know its done and what the condition the contacts are in to start with
(reduces the chance of potential future probs with the ignition barrel)