So, in some events the wire breaks, or connection is broken. The question is then:

How should this connection be for this blue wire going to E-chip? And why is it there?

Quickly- the “why” – I believe there was a voltage stability issue with power going to the E-chip.
The resistor was added to resolve the problem.

There are two or three possible scenarios for the blue wire / resistor combo:

1) You have a daughterboard with E-chip on it and there is a large 75 Ohm resistor on the piggyback board.
(The resistor could be on the top or bottom of the daughterboard, but would definitely be on the daughterboard closest to the logic board edge with the blue connector (the edge just as in the picture below).
I don’t have a pic of this configuration, but the circuit would be the same- you would want the blue wire from R19 to connect to the end of the 75 Ohm resistor NOT directly connected to pin 1 and 32.

2) You have a daughterboard with E-Chip on it, and there is NOT a large 75 ohm resistor on the Daughterboard.
I would expect it to be sitting much like in the pic, nestled by the blue connector.

3) You have an E-Chip without a daughterboard and it should look exactly like the pic.

**NOTE: The 75 Ohm resistor does not use any through holes or solders to connect it to the PCB,  just the wires attached to R19 and C46 hold it in place, and then the blue wire going to pin 1 and then onward to pin 32.  Verify the leads to the 75 Ohm resistor are insulated as necessary so they can’t short anything…

***The reality is this- even if you had a daughterboard, if you remove the Pin 1 and Pin 32 (the pins at each end of the E-chip on that side, like the picture) from the socket, and point them out, then solder to the pins  and replicate the circuit per picture below, then it would be correct, no matter what rev board you have.

My understanding is that some of the daughterboards just built the fix in….
Screen Shot 2015-08-31 at 6.19.01 PM Screen Shot 2015-08-31 at 6.52.03 PM