Hi,
We are not using signals so I can't say much about those...
But the easiest way to check the imported terminators in Creo is to click open the "()Cabling Parameters"- view in the Cabling module (image "ele_paprm_for_j1_j2.jpg". There you can see that, in my case, the TERM_NAME parameters that were imported from the schematic are named "terminal_1-4".

You can actually read the .xml file and see what "TERM_NAME" the schematic exports. In my case the xml for the connector looks like follows (Each connector pin has its TERM_NAME value set in schematic).
<COMPONENT name="J1" REFDES="J1" subType="COMPONENT" type="COMPONENT" context="NONE" modelName="Mx_43025-08" >
<SYS_PARAMETER id="comp_J1" />
<PARAMETER name="LAYER" value="DEF_LINES" />
<PARAMETER name="NUM_OF_PINS" value="8" />
<PARAMETER name="OBJ_TYPE" value="CONNECTOR" />
<PORT name="1" physicalName="1" >
<SYS_PARAMETER id="comp_J1_1" />
<PARAMETER name="ENTRY_PORT" value="PIN_1" />
<PARAMETER name="SIGNAL_VALUE" value="X" />
<PARAMETER name="GROUPING" value="ROUND" />
<PARAMETER name="LAYER" value="DEF_LINES" />
<PARAMETER name="INTERNAL_LEN" value="4" />
<PARAMETER name="TERM_NAME" value="terminal_1" />
<PARAMETER name="TERM_AUTO_ASSIGN" value="TRUE" />
</PORT>
<PORT name="2" physicalName="2" >
<SYS_PARAMETER id="comp_J1_2" />
<PARAMETER name="ENTRY_PORT" value="PIN_2" />
<PARAMETER name="SIGNAL_VALUE" value="X" />
<PARAMETER name="GROUPING" value="ROUND" />
<PARAMETER name="LAYER" value="DEF_LINES" />
<PARAMETER name="INTERNAL_LEN" value="4" />
<PARAMETER name="TERM_NAME" value="terminal_2" />
<PARAMETER name="TERM_AUTO_ASSIGN" value="TRUE" />
</PORT>
<PORT name="3" physicalName="3" >
<SYS_PARAMETER id="comp_J1_3" />
<PARAMETER name="ENTRY_PORT" value="PIN_3" />
<PARAMETER name="SIGNAL_VALUE" value="X" />
<PARAMETER name="GROUPING" value="ROUND" />
<PARAMETER name="LAYER" value="DEF_LINES" />
<PARAMETER name="INTERNAL_LEN" value="4" />
<PARAMETER name="TERM_NAME" value="terminal_3" />
<PA...
Usually if I want to change the terminator values I change it for the given component in Schematic.
But you can change the terminators also in Creo by running the "Terminator Table" command in Creo.
As an example I run this terminator table .ttb in Creo
---- Clip ----
SET MATCH MATCH
PIN CONN PIN
TERM_NAME MODEL_NAME PIN_NAME
chterm_1 MX_43025-08 1
chterm_2 MX_43025-08 2
chterm_3 MX_43025-08 3
chterm_4 MX_43025-08 4
chterm_5 MX_43025-08 5
chterm_6 MX_43025-08 6
chterm_7 MX_43025-08 7
chterm_8 MX_43025-08 8
---- Clip ----
Creo changed the terminators to what is shown on image "after_running_termtable_in_creo.JPG".

The "TERM_NAME"-parameter can then be shown in drawing tables (we usually add extra info by reading the terminator files separately for each terminator (.trm-file). An example of the .trm file is here
---- Clip ----
! Enter or modify parameters for the terminator.
! You may use the help functionality of Pro/TABLE
! to enter pre-defined parameters.
! Terminator Name
NAME 43030-0001
! Terminator Description
DESCRIPTION "CONN TERM FEMALE 20-24AWG TIN"
! Terminator Manufacturer
MANUFACTURER Molex
! Terminator Manufacturer Catalog #
MANUFACTURER_CATALOG 43030-0001
---- Clip ----
Br, Lars