Leave API

Hi

I need to use the Leave API to add new records, I have this url:

https://people.zoho.com/people/api/leave/records?authtoken=xxx&xmlData=<Request><Record><field name='Employee_ID'>yyy</field><field name='To'>2017-09-13</field><field name='From'>2017-09-13</field><field name='Leavetype'>344394000000217165</field></Record></Request>

I would like to know what field to add to the above url to be able to add numbers of hours I was on leave, the leave type I have selected has "Hours" as Leave Unit.