r/Morakniv

Am I doing this right or no?

Can anyone advise how I go about retaining the blade in the handle? This is my son’s knife and I think there was some type of retainer in the bottom of the pommel but it’s since been lost. My best guess is a spring pin but thought I’d ask before just trying stuff. The hole at the bottom is just shy of .250 inch or 6mm diameter. Thanks!