vim - How to autoexpand neosnippet with deoplete dropdown menu?

Question

Iam looking for an configuration (init.vim) to expand an neosnippet when selected with the deoplete plugin drop down menu.

What i've done so far:

1. Added all to vim-plug

   call plug#begin ('~/.local/share/nvim/plugged')
   Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
   Plug 'Shougo/neosnippet.vim' | Plug 'Shougo/neosnippet-snippets'
   call plug#end ()
   

2. configured for autostart

   " Use deoplete.
   let g:deoplete#enable_at_startup = 1
   " Use smartcase.
   let g:deoplete#enable_smart_case = 1
   " Set minimum syntax keyword length.
   let g:deoplete#sources#syntax#min_keyword_length = 2
   

This leads to this screen:

Now I want to expand this snippet, when hitting <Enter> at the selection. Has anyone suggestion how to achiev that?

Thanks for your time and best regards,

Befedo