/etc/wicd/encryption/templates/wep-hex is in wicd-daemon 1.7.2.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | name = WEP (Hex [0-9/A-F])
author = Adam Blackburn
version = 1
require key *Key
protected key *Key
-----
ctrl_interface=/var/run/wpa_supplicant
network={
       ssid="$_ESSID"
       scan_ssid=$_SCAN
       key_mgmt=NONE
       wep_key0=$_KEY
       wep_tx_keyidx=0
       priority=5
}
 |