using groovy script in readyapi

I have maven project for my readyapi, have java and groovy script in it, and placed jar into C:\Program Files\SmartBear\ReadyAPI-3.51.0\lib my groovy script directory is in src/main/groovy directory. So I am able to use java classes but when I try to use groovy script in readyapi step it doesn't work, not able to find groovy class.

I can add my groovy script to C:\Program Files\SmartBear\ReadyAPI-3.51.0\bin\scripts and that works as expected, but how can I use groovy script in my maven project from jar file I added it to C:\Program Files\SmartBear\ReadyAPI-3.51.0\lib ?

Here is the groovy script I use in my readyapi to call groovy script in maven project:

import src.main.groovy.Utilities

def utilities = new Utilities(context, context.testCase.testSuite, log)

utilities.loadConfigurations()

Thanks in advance,