Under dash electronic help Wiper and ignition

[Imhisnibbs]

Hi there,

I have two questions:

First is in regard to windshield wiper switch connections for my 72 Bronco

There are 7 connectors and I am having trouble with two of them:
First is 763 which is power in- an orange wire
However, there is also 950 which is power in for wiper -a black wire
I am putting in an EZ wiring harness and there is one wire for power into the wiper. Question: How do I deal with that?
Also, the wiper doesnt seem to have need for a ground in EB wiring diagrams? Am I mistaken?

Second question is connecting the ignition wiring
there are 8 connectors: A, D1, D2, P, H, B, R & I
I am trying to figure out which wires go to each connection

I think B & A are both to the Battery? positive?
R is Park & tail Lights
I is dash lights
H Headlights
Di/D2 Interior
P parking

Am I close? what is the difference between B & A?

I am so close to the end of this harness install and I still don't know a thing about electronics with one exception: Not to pee on an electric fence