渡わたりをつける

expression, ichidan verb

make contact; get in touch; establish relations

Used when someone arranges a connection or opens a channel of communication, often through an intermediary or by taking initiative. Implies a deliberate effort to create a relationship or understanding.

• 取とり引ひき先さきに渡わたりをつけるために、知ち人じんに紹しょう介かいを頼たのんだ。

  I asked an acquaintance for an introduction to make contact with a potential business partner.

• 彼かれは裏うら社しゃ会かいに渡わたりをつけて情じょう報ほうを集あつめた。

  He established contacts in the underworld and gathered information.