You are asking the wrong questions.
The "CTL" denomination refers to the control board, and should generally be ignored, the only place it really appears is on the I/O configuration in the software and the relationship between CTL pin and OEM pin is different for every ECU or loom adaptor.
All the info you need is here: 
viewtopic.php?f=6&t=137
I've copied below, you may also want to get the OEM ECU pinout in PDF to go with it.
A:
09  08  07  06  05  04  03 [] 02 01
21 20 19 18 17 16 15 14 13 12 11 10
31 30 29 [] 28 27 [] 26 25 24 23 22
B:
09 08 07 [] 06 05 04 03 02 01
19 18 17 16 15 14 13 12 11 10
28 27 26 25 24 23 [] 22 21 20
C: 
07  06  05  04  03 [] 02  01
16 15 14  13 12 11  10 09 08
24 23 22  [] 21 20  19 18 17 
D:
07  06[]05 04  03  02  01
15 14 13  12 11 10  09 08
22 21 20  19 18 []  17 16
E:
06 05 04 03 02 01
12 11 10 09 08 07
17 16 [] 15 14 13
AN01 = AB1	Crank (B2)
AN02 = AB2	Cam (B1)
AN03 = AB3	AVCS L (E9)
AN04 = AB4	AVCS R (E2)
AN05 = AU1	Vehicle Speed (D1)
AN06 = AU2	MAF Signal (E13)
AN07 = AU3	TGV L (B13)
AN08 = AU4	TGV R (B23)
AN09 = AV1	Throttle (B7)
AN10 = AV2	MAP (B8)
AN11 = AV3	O2 Signal (B17)
AN12 = AV4	A/C Request (D6 on EU or D5 on JDM)
AN13 = AR1	Coolant Temp (B18)
AN14 = AR2	Air Temp (B27)
AN15 = AR3	Test Mode (D5 on EU or D14 on JDM) [KILL/ALS/LAUNCH/CAL]
AN16 AR4	Neutral Switch (D8) [ALS/LAUNCH/PIT]
A 2001 sti pinout is essentially the same through to 2005.