Front turn signal replacement

I have a 1989 Caravan and the front left turn signal lens is broken. I've bought the part (which is the whole light assembly). It has two screw holes on top and one on the right side. How much of the
headlight assembly do I need to remove to install the turn signal assembly?

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.