Which Leap password for BBLink?

Hi,

Till now I used a BB Z10 and backed up contacts etcetera with BB Link installed on PC computer (Win7). 

Now received a BB Leap and connected it to BB Link in order to transfer contacts. 

When connecting Leap via USB to BB Link a password is requested. I now stopped after the third unsuccessful attempt (of only five possible!) and ask you for help:

Which security password is needed? The one from the business section or the one from the private section or what else, since I understood it's not the BB ID? Don't want to exclude a typing error so far, but need to know the target password before burning the last two attempts. 

Thank you Vers much in advance!

MH