No special place under the first aid kit and a fire extinguisher in XL. The small size kit is placed in the pocket (right arch in the boot). The fire extinguisher (2 l) is not easy to accommodate. You can drive it in an amateur bag.
A lot of drivers take him in the trunk. In this case, it is necessary for the extinguisher to be fixed in some way (lying in a special box, etc.), and not at the boot. Yeah, and, you know, the Mitsubishi Outlander's trunk isn't the best place to store it. The fire extinguisher must always be at hand. Therefore, some car owners prefer to keep it under the front passenger seat. But there's a downside here. In this position the extinguisher closes the air ducts and is subject to excessive heating.