Data Migration - Importing with Different Module Layouts

Data Migration - Importing with Different Module Layouts

Hi,

I am trying to migrate using the Setup > Data Migration utility. We have 3 different layouts that we want to import data to, however I can't work out what format we need to have the layout field in.

I have tried the following which has not worked.
55689000000222511 (saved as text)
'55689000000222511'
"55689000000222511"
zcrm_55689000000222511

I can't find any help files on the topic.