Can anyone help identify the correct wires and connector type for a Hitachi sensor test harness (ST1729)?

[Devlh Laveighn]

I'm trying to troubleshoot a sensor on my Hitachi and could use some help with the ST1729 test harness. The service manual shows wires 21, 34, and 35, but the diagram is pretty hard to read. It also labels the connector pins as 1, 2, and 3 from left to right, and I'm not sure which wire I should be checking to verify the correct sensor voltage.