want to add new extra relation types as per screenshot

We want to add new extra relation types as per screenshot .

(Fax, Mobile, Pager, Telephone, Voice Mail) are existing .

We are looking for (e-mail, Twitter, Facebook, and Web) to be added. Do you know where in system  this can be added.

Current Form
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Form Application : Application Object Library
Form Name : FNDSCSGN
Form Path : UNKNOWN
Form Version : 11.5.124
Form Last Modified : $Date: 2006/10/24 10:54  $

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Forms
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CSCCCCRC : 11.5.48
FNDSCSGN : 11.5.124
JTFBRCTL : 11.5.31