How to create new menu category under CMS=>Admin

Hello,

I have a requirement to create new menu category under CMS => Admin section.

Below is the existing out-of-box menu

1) Access Rigths

2) Scheduled Jobs

3) Tools

So i need to create new category to above existing structure like, under this new category i'll create multiple .aspx pages as per my need.

4) Employee Management

I have tried to use below attribute but it is creating under "Tools" category.

[GuiPlugIn(
Area = PlugInArea.AdminMenu,
Description = "User Login",
Category = "Employee Management",
DisplayName = "User Login",
Url = "~/Employee/UserLogin.aspx",
SortIndex = 1020)]

Can someone help on this?

Thanks,

Suresh Bodapothula