2008 pds state of charge meter install help

[bedrock]

hi,
i ordered a state of charge meter for my 2008 pds/txt electric golf cart (36 volt)
i also ordered the "accessory" harness.

1.the instructions ezgo gave me cannot be the right ones.first off it says the accessory harness has a black and green wire. (they are black and red).

2. they show hooking the green wire to something that looks like a solenoid.
(i cannot find anything the even resembles such solenoid)

3.it shows a key switch with 3 or 4 connectors on it and mine only has 2 prongs with 2 wires already attached. i abandoned that idea and was going to hook straight to the batteries (black ground, red positive) and STILL get nothing on the meter. no sign of life whatsoever.

i just installed brand new trojan batteries a week ago, and wanted this meter to let me know when to head back home.
i know this has to be a simple install....what the heck am i doing wrong?lol
Dino