Side nocks or pin (post) nocks

[Muleman]

Anybody did a tutorial on either one of these type of string grooves?

[Del the cat]

In what context? What do you mean by a side nock... a medieval English longbow (warbow) sidenock) probably isn't what you mean.
Presumably a pin nock is like your head and shoulders with the string loop over the head and pulling on the shoulders.
Much better to have a nock overlay on the back of the bow and the string groove on the back, that avoids having a lot of waste wood that isn't doing anything on the sides of the bow at the tip.
https://bowyersdiary.blogspot.com/2012/09/final-adjustments-and-angst.html
Del

[bassman211]

Many of the native horse bow tribes cut a one side nock on the top limb for easy stringing. They would just pull up on the  low bracing string , and it would pop right into the nock. Pin nocks are short ,rounded, thin nocks. Neither is any harder to make than cutting regular nocks into a bow. I have cut them both ways, but my favorite nock is a tiny tear drop nock. Light but strong.