1. Please add a new Script tag via Script Manager similar to one created here (Convermax YMM Site Search):
https://store-xxxx.mybigcommerce.com/manage/script-manager
See a screenshot attached.
https://client.convermax.com/static/StoreId/search.min.js
2. Please create a new search page here:
https://store-xxxx.mybigcommerce.com/manage/content/pages
Page Name: Search
Page Url: /search/
Page Content:
<!-- Convermax Site Search -->
<div id="cm_results"> </div>