how can i call 3 relationship in single join @ $this->col CRUDBOOSTER

how to make 3 relationship in single join

@ $this->col with CRUDBOOSTER

i just wanna change the id colum in this [picture][1] into nama colum
[the db i use][2]

i've been try to make 3 relationship in single join in this code :

$this->col[] = array("label"=>"Jabatan","name"=>"profil_id","join"=>"profils,jabatan_id","join"=>"jabatans,nama_jabatan");` 

but it's not work, the only i can do just make 2 relationship in single join like this code :

$this->col[] = array("label"=>"Jabatan","name"=>"profil_id","join"=>"profils,jabatan_id");`

via Chebli Mohamed