It didn't take long until the ship received a transmission from the same person the original one came from.
Greetings dimensional travelers. I suppose you heard my call? Anyways, I assume you came out of curiosity or out of willingness to help. If you wish to come to me, follow the lights on the surface into a mountain hangar. Don't worry, the hangar is big enough.
Underneath the ship, on the planet's surface, several lights were glowing in the direction of a hollowed mountain. There clearly was an entrance.
Almost forgot something important, don't stray too far from the lights or you'll get shot down by automatic defenses. I'm unable to turn those off, so be careful.