I need help with a mapping

[refaelsh]

Hello,

I need help with a mapping, please.
The documentation here: https://github.com/nvim-orgmode/orgmode/blob/master/DOCS.md#mappings, is not clear to me.
I want to remap this: https://github.com/nvim-orgmode/orgmode/blob/master/DOCS.md#org_babel_tangle
to be <leader>t.
I cant understand from the documentation how to do it. Can someone please provide an example?