having a chat widget appear (or not!)

I'd like to offer paying customers premium support. I have a support widget that I plan to use on a system called tawk.to. They advise to embed the following code on the page. 
<!--Start of Tawk.to Script-->

<script type="text/javascript">
var Tawk_API=Tawk_API||{}, Tawk_LoadStart=new Date();
(function(){
var s1=document.createElement("script"),s0=document.getElementsByTagName("script")[0];
s1.async=true;
s1.src='https://embed.tawk.to/5fc604b2a1d54c18d8ef211d/default';
s1.charset='UTF-8';
s1.setAttribute('crossorigin','*');
s0.parentNode.insertBefore(s1,s0);
})();
</script>
<!--End of Tawk.to Script-->


Now in my case I am adding the a few lines of HTML at the bottom of every page (see below). Can I just paste the above script onto that page and expect it to display? 
<h1>company</h1>

<p></p>
<a href="https://researchstudytoolkit.tawk.help/category/setting-up-the-research-credit-study-toolkit#company-tab" target="_blank">help on setting up the research study online</a>
<br>
<br>

can I just place the above script here?

proof that an old dog can learn new tricks