(Spoiler) How the last 7 minutes lead to Alien

Here is my take on how the last 7 minutes of Prometheus can be linked to Alien. It takes into account different planets, but not necessarily different ships. Hence the derelict can be the ship we see in Prometheus. After being rammed by the Prometheus and falling on the ground, the alien ship is somewhat damaged and can't perform an interstellar trip, its mobility being limited to short ranged trips (i.e. just interplanetary, moving from one moon to another). On LV-223 there are no repairing facilities, but there's a good service station on LV-426, just a few light seconds away. The SJ brings the ship there and while it's being serviced, he goes to the diner and order some food for takeaway. Unbeknownst to the SJ, the diner is the same we see towards the end of Spaceballs, and the SJ happens to order the infamous "Day's Special". He then gets back to his ship with his lunch, and the following events lead directly to Alien... The acoustic beacon heard in Alien is actually a SJ rendition of "Hello my baby, hello my honey"...