How to pass Impact and Urgency variable values from service Portal to RITM form?

[Raghav22]

I have crated 2 variables in service portal form as you can see in the below screen shot. When I select values of Business Impact and Business Urgency then on submit click I have to pass these value to RITM form and in RITM form there are 2 fields Impact and Urgency, those 2 values of service portal should mapped with these 2 RITM values (impact and urgency) and after mapping it should be auto populate in Priority field.

Also, I have created catalog client script on onsubmit for Business Impact and Business Urgency.

1. Service Portal:

2. RITM form:

[Vasantharajan N]

Nothing to do with Priority matrix as your ask i understood is to set Impact and Urgency on RITM record from the user selected value for the variable. Please correct me if my understanding is wrong. 

[Raghav22]

Yes, your understanding is correct. Just to add more in detail

1. on click of submit button(which is present on my form) of service portal these 2 values should be mapped on RITM field of impact and urgency,

2. based upon impact and urgency values, priority should be auto populate .

[Deepu9997]

can you help me with the script to be update in the workflow.