Top XX Interfaces by Percent Utilization

I am trying to modify the report for Top XX Interfaces by Percent Utilization to just return nodes for Caption Like '*RO_1' or Like '*RO_2'. This is to filter just my certain devices in my organization.

When I try to complete the steps by pressing next I get Custon SQL filter is incorrectly formatted.

I have two other reports that work fine with this parameter based off of Top XX Interface AVG Response Time and Top XX Interface Current Response Time. 

Does any one have a good reference to filter nodes by as it pertains to syntaxe and fields each report is using?

I also attached screenshots to illustrate what I am talking about.

Thanks