SSL domain mapping

Hi guys, i have a problem with my multisite installation. I have an ssl certificate for the mapped_domain. The mapping of the mapped domain works fine but i don`t know how to tell wordpress to use https instead of http? Also when i map the domain in the mutlisite it jumps back to http://www.mapped_domain and not to https://www.mapped_domain. when i force ssl on the home site truh domain mappings options i always get an redirect error. please have a look i granted you access to the site!