How to pass q parameter to fusion Rest connector in PCS

Summary

How to pass q parameter to fusion Rest connector in PCS

Content

I am trying to call purchase order REST API in PCS. I am able to pass template parameter to the REST API but in my request payload i am getting purchase order number.

https://xxxx.fa.us2.oraclecloud.com/fscmRestApi/resources/11.13.18.05/purchaseOrders/{PoHeaderId}

is it possible to pass q parameter to REST API in PCS? 

Appreciate if someone suggest me solution or provide sample code which i can refer.

Thanks,

Hemen