Shortly after completing the previous quest and leaving the establishment, you’ll get a message from the Coon inviting you back to the Coon Lair for another meeting. Head to Cartman’s House and use the new password, “Get Scrambles Fast”. After the conversation, you’ll be prompted to change out of your costume. You can change out of your costume in the Coon Lair or if you still have business to do before transitioning to night time (and the next major main quest), you can opt not to change out of your costume for now.