How to open K2 form on SharePoint library document set create button

Hello  @ProInception 

Please review the URL below it maybe what you are looking for

Working with sharepoint forms

https://help.k2.com/onlinehelp/k2five/userguide/5.1/default.htm#Create/K2ForSharePoint/Create/CreateForms.htm%3FTocPath%3DCreate%7CK2%2520for%2520SharePoint%7CCreating%2520an%2520Application%2520Through%2520a%2520List%2520or%2520Library%7C_____2

Thanks for the response but this URL describe the content type form on the SharePoint list. I am looking into Sharepoint library. 

Hello  @ProInception 

Okay in that case please have a look at the following URL for editing application through a list/ Library you may find it to be helpful.

switching between form options

https://help.k2.com/onlinehelp/k2five/userguide/5.1/default.htm#Create/K2ForSharePoint/Edit/Forms.htm%3FTocPath%3DCreate%7CK2%2520for%2520SharePoint%7CEditing%2520an%2520Application%2520Through%2520a%2520List%2520or%2520Library%7CForms%7C_____2