If i go through a door to another level and i want to come back how to i go back to that door instead of my start point?

So i made resident evil like game and when i go to another level using a door and i try to go back to my original level i always start at the set start point in the middle of the level instead of the door that i used to enter the second level. How would i got about setting a start point i want the player to go to when they use a level change door?

there a ton of other questions asking this same thing that have been answered before. a quick google search also comes up with tutorials on this subject. below i linked two other similar questions but i know there are many more since ive answered the same question many times before.