So took a little bit of time and went at it with a multimeter and this is what I got, haven't double checked it or anything but it seemed to have all the necessary pins for the chip. EDIT: (Looking at amyk, net 3, I think it is a more complete picture of my probing on pins for WE/CE/etc, I'll double check on my side but it looks correct)
Going to try and wire it up and get some values out but couldn't really find any connectors that matched the AMP175564, probably will just have to solder directly to the board :| If anyone knows of a connector that is roughly 40pins, 1mm pitch and the pins are roughly 0.5mm in diameter, let me know!
1 to pin 40 (presence detection?)
2 power (also pin 39), copper fill on front of PCB -> GND
3 power (also pin 38), copper fill on back of PCB -> VCC
4 n/c
5 unpopulated R, other end off-board
6 R, chip, off-board -> CE#
7 R, chip, off-board -> Q0
8 R, chip, off-board -> Q1
9 R, chip, off-board -> OE#
10 not nc on my board -> WE#
11 R, chip, off-board -> A0
12 R, chip, off-board -> A1
13 R, chip, off-board -> A2
14 R, chip, off-board -> A3
15 R, chip, off-board -> Q2
16 R, chip, off-board -> Q3
17 not nc on my board -> RY/BY#
18 R, chip, off-board -> Q4
19 R, chip, off-board -> Q5
20 R, chip, off-board -> A4
21 R, chip, off-board -> A5
22 R, chip, off-board -> A6
23 R, chip, off-board -> A7
24 R, chip, off-board -> A17
25 R, chip, off-board -> A8
26 R, chip, off-board -> A9
27 R, chip, off-board -> A10
28 R, chip, off-board -> A11
29 R, chip, off-board -> A12
30 R, chip, off-board -> Q6
31 R, chip, off-board -> Q7
32 R, chip, off-board -> Q15/A-1
33 off-board -> nc
34 R, chip, off-board -> A16
35 R, chip, off-board -> A15
36 R, chip, off-board -> A14
37 R, chip, off-board -> A13
38 power (also pin 3) -> CE#
39 power (also pin 2)
40 to pin 1 (presence detection?)