It appears traditionaly they draw the scabbard with the left hand then draw the kukri from the scabbard with the right. ....
That type of draw seems odd to us in the West being raised on Westerns and the fast draw. In early pictures of real gunmen and shootists, their revolvers were worn on the front,sides,and stuck in anywhere that worked for them. Most, except for card players who needed a quick draw, did not rely on the fast first shot and they got the job done by being willing and accurate. I believe the Nepalese in the pics are willing and accurate.