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Remove the mount's JIS screws around its bearing surface and into the contact cluster
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After grounding yourself, pull out the flexible circuits' tabs from the main board with a soft, strong toothpick (reinstall similarly)
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Or, as applicable, nudge up the flexes' tabs by their flared edges
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Melt a hole with a soldering iron for the tap wires to exit under the board (route a little differently to preserve full zoom range)
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Trim extra plastic from access hole with a sharp, sturdy hobby or utility knife (note basic placement's relation to interior structure)
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Flatten out your wires' ends, tin them, and trim them to compact flat pads
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Set each wire's pad on a contact solder point on the board's reverse, oriented toward access hole, and warm with the iron to meld
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Return the board to its original orientation and start one wire through the hole at a time, labeling its pinout as you go
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Ease the board back into position, then reconnect the flexes, replace the mount, and refasten all screws