There is no special SUI way (yet), so you have to write your own CSS
There are too many SUI classes in your code.
This is not required: <div class="ui grid container">when you define another grid inside it.
Class two columnin is <div class="ui two column divided grid">also redundant.
, , , CSS, .
. JS Fiddle: https://jsfiddle.net/batrasoe/5289q8fr/1/
...
<div class="left column">
Some Text
</div>
<div class="twelve wide column">
<div class="ui link cards">
...
CSS:
#grid .left.column {
width: 200px;
}
, two wide , , , .left.column
/ - twelve wide column.