HP Service Center Repair tag 41CX Fullnut - Decipherable?

[TallKey]

Bolts, maybe:
Has the longer 3/8" fasteners.

Included a photo of the 3 HP fasteners and a Hillman #2 3/8" slotted brass for comparison. Also note the 0.4mm nylon spacer.

Have read HP switched to the 3/8" lower fasteners or at least replaced them at a repair cycle.

First time seeing the 0.4mm nylon spacer and the 3/8" HP black fasteners. Also first time with a FN CX.

J3-J4 leads here:

Service manual:
J3 top row pads, 4-33/4-34
J4 Vbat
X3 I/O assembly (port 3?), 4-67/4-68

J3 position 1 is Vbat for X1 X3

Of note, there was a bit of gold colored fleck stuck to the flex connector at position 1. Calculator was working fine. The upper back fastener wells need repair.

Have before and after pictures of the flex connector, if anyone is interested. Looks like part of a circuit board pad pulled loose from a J3 (not from this board).