Hatsan BT65 Safety

Hi Guys and Gals....

In a bit of a bind....I sold my Hatsan BT65 and was in a hurry to get it out the door and forgot to re-install the safety.....Tore it down and gave it a good cleaning before shipping since it sat for awhile and completely forgot to do that!!

Can anyone give me a quick clean write up of how to install it that I can send to my buyer?

Rookie mistake I know!!

Thanks 

Dr. Mike