Southeast
noun, の adjective
The South East is the Southeast.
This is a jukugo word that uses the on'yomi readings for both kanji. You've seen those readings before in 南米 and 東京, for example, so you should be good to go here!
車は、南東の方に行った。
The car went in a southeast direction.
会社のビルは南東を向いています。
The office building is facing southeast.
南東は、よく日が当たります。
The southeast gets good sun light.