How to perform Windows security updates on WYSE D90D7 from WDM 5.0

I have three WYSE D90D7 thin clients running Windows Embedded 7 Std that I am wanting to patch with the latest Windows security updates.  If I look at the security patches installed on the machines, Isee the latest were from 2013.  How would I go about downloading the patches from the WYSE support page and uploading them all to the devices?  I know it will go through WDM, but I can find no information on this in the Admin Guide.  Furthermore, there are literally hundreds of patches...do I need to download ALL of them and upload them all to each device??  Any information on this subject would be GREATLY appreciated, thanks.