I'm a latin student so I can translate,
He says;
"Doorway [portal] and light in the desired orientation of Ursa major"
"Porta, [sic, the comma isn't needed] et lux in desidero orientalem Septentrionalis"
Interesting there is no verb so this is all just the subject of an incomplete clause.
Stranger still, the Celts were historically almost entirely exterminated by the Romans in Gaul and most of the British isles so its funny he would speak in Latin all things considered.