You can use the Sattiq Guest Quarters key in Warzone 2 DMZ to unlock a door inside the Sattiq Cave Complex point of interest at D4 on the map.

To use the key, you will need to locate the locked door found in this location. The door is to the north of the Sattiq Cave Complex.

However, you will need to be wary as there are a ton of AI soldiers that spawn around this area. So make sure you are fully equipped before making your way to this location.
If you want to be safe, you can activate the nearby UAV tower to scan for nearby enemies. Once you have found the door, simply press the input as directed on the screen to enter the room.
This keycard is part of a large group that you can find all across Al Mazrah; however, there is one key that you will need to use in a location outside of the map.

How To Get a Sattiq Guest Quarters Keycard
To get a Sattiq Guest Quarters Keycard, you will need to find one randomly across the map. The keycards will spawn inside the following:
- Loot crates
- Medical loot caches
- Inside coat pockets
- Inside loot bags
These can be found in most buildings and you may need to loot for quite a while before finding a key. Here is an example of what a keycard will look like when found:

What Is the Sattiq Guest Quarters in Warzone 2 DMZ?
The Sattiq Guest Quarters is a small room with a ton of loot. Inside you will find the following:
- An orange loot crate
- A bag of money
- A loot bag
- Coats containing money and other key cards
- Collectible loot to sell at the shop

This loot will certainly help you as you complete all the DMZ missions available. This gear can also help you complete a Stronghold to get even more high-value gear.
However, you will first need to obtain a Stronghold keycard, luckily it is quite easy to get your hands on one!