The affix kan comes in the sense of 'a desire thereafter' after the words 1. dhana and 2. hiraṇya being in the Locative -7th case in construction.,
The word काम means 'desire, wish'. Thus धने कामः = धनको देवदत्तस्य, हिरण्यको देवदत्तस्य ॥,
धन-हिरण्यात् कामे
Adhyāya 5 · Pāda 2 · Rule 65