I don't like the look/thought of it being powered direct from the alternator. A "pro" (by my book) job would be to take a feed from the battery or main fuse panel supply, avoiding adding under bonnet wiring. It may be getting the 14v alternator battery charging voltage, which won't be good for it.
i don't like the idea of it being direct to the alt too. it also doesn't look 'pro'
but it doesn't matter really. if the alts pumping 14v out then everything is getting 14v, makes no difference if you move the connection to the bat or not.
just looks burnt out to me, what brand was it?