SQL 2012 :: SSIS To Load Files From Two SFTP Location

How to load files with similar format , from two different locations into same database with same ssis.

Lets say
Location 1: C:LoadFilesCust1APP_123445.txt
Location 2: D:LoadFilescust2VDD_543121.txt

Currently we have one ssis which loads and process files from C:LoadFilesCust1 only. we have to modify the existing package it to load files from Location 2 (D:LoadFilescust2) as well. Also while loading, the ssis should assign a value to existing column CustID depending upon the file name. File names always start with APP_ in first location. VDD_ in second location

Assign CUSTID as 100 if file name starts with APP_
Assign CUSTID as 200if file name starts with VDD_