Account Identification search enhanced for default value

I want to default the Account group to a value in the account identification search. I have added the 'Account Group' field to UI through ICCMP_BP_SEARCH/BupaSearchB2B view and context node searchcutomer. What should I do next to make this field work in search with a default value 'ZPPX'? If you can please briefly give me steps, I will follow them to make the enhancement.

Thanks,

Rohini