A single "place" can have a lot of locations. For example a typical home will have a Garage, living room, bathroom.. etc.. all are technically different locations and with movie magic, they are only in the SAME house if thats what you show...
Think in movie terms. Picture how a movie scene might open with an outside shot of an office building, then the next shot is folks sitting around a conference table.. We assume the conference room is inside the building we saw a second ago, but there is no way to really know for sure.. in fact its VERY rare that the external shot of ANY building is the same building you see from the inside. Use this trick with the locations you have.
That said a short that takes place in a single room is common too.
About filling in the gaps..
part of the magic IS the physical process. Writing it by hand, shuffling real cards around in RL works your brain in a different way, new synaptic connections are made and new ideas come forward.
The cards are critical to the rest of the process. When your done writing and organizing the cards. You number them from start to finish.
At this point you might decide to "write a script" which is much simplified as your outline is DONE. In that case you just turn each "card" into a scene in your script, describe the action and write some dialogue if any is needed. There is no reason to write much more then whats on the card though. Make the scenes and card numbers match up.
I then add more information to each card.. I break it down to shots. For example, the card that reads
"A strange man is in his car, looking at his watch." Might require three shots.
- External Shot of the Car
- A shot from inside the car as the man looks at his watch
- An closeup of the mans watch
I write that on the card.
As the cards are numbered you can mix them up for shooting order very easily without reworking anything this is very good to do.
They fit in you back pocket during the shoot, you can write a big X on them once the shots listed on each card is done etc.
