You can download schematic of CY8CKIT-145-40XX from
=== CY8CKIT-145-40XX page ===
=== schematic ==
Then you can check which pin is not connected to particular use.
Yes, it is a time consuming task...
WARNING: Spoiler below
From what I tried following pins seem to be available
P1_7, P2_7, P3_7, P4_0, P1_0, P1_1, P1_2
Please DIY next time ;-)
If you read CY8CKIT-145-40XX_PROTOTYPING_KIG_GUIDE
In the page 35 and page 36, almost same table is available.
BTW, to avoid this I often remove these shield wings so that I can use most of the pins.
As far as I solder pin sockets they can be connected using jumper wires.
I was using pin 4_0 for the shield. but still it takes signal.
By the test setup, I meant the physical sensor connection in the board and the location of the shield hatch. Please send a photograph of the sensors. The one shared now is the schematic from the top design and pin assignment.
A picture of the real "sensor" and the method of implementation would be helpful.