Actually I am new to jQuery datatables plugin.
I have attached the plugin to my tables using this method using this code.
$(document).ready(function()
Yes you can make a class in your css like:
.pull-left{ float: left !important; }
and then add this class to datatable search div using jquery or javascript.
example:
$('.dataTables_filter').addClass('pull-left');
make sure your script is in the head part of your html.