Adding Custom Fields

Hello

I wonder if somebody could give me some advice in relation to custom fields.

I use wp all import to import job listings into my theme jobseek and use custom fields like these below. They work perfectly

_salary_min = {salarymin[1]}
_salary_max = {salarymax[1]}
_job_location = {location[1]}

I wanting to know if its possible to add the job type and job category to this?

My reason for doing so is i am using schema pro and want to add as much information into it as possible so when i submit the job listing to google it will have all the information possible and hoping this will give me better position within google jobs.

Any help on this would be much appreciated. Thank you

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