Broken Teach Pendant's cable (E)

Welcome to the forum.........

I do not have the actual pinout for the part number, but if it is E Controller, most pinout is the same.

Something I have will help, but I can only send it via conversation.

What controller are you working with - E2x, E3x, E4x, E0x?

I have had a similar incident - dropping a piece of steel severed the tp cable -

50978-0360-L20. The cable is not sold separately from the TP. The replacement TP is USD4444.

The gray market on ebay has replacement cables for $1200 - $1900 - but I am thinking perhaps I can add a plug for $300 at the break to rejoin the ends - I am not sure a soldier and heat shrink joint will provide the strain relief needed for tugging on the cable.

HARTING Configuration 5PBN.

any advise is appreciated.

I cannot add anything further other than to purchase original spares.

Teach Pendant cables are heavily shielded, and last time I looked are not solder friendly and the colour of the cores are replicated which require individual DVM continuity matching.
Your method of repair could work and is a cheaper option.

Teach Pendant cables AFAIK are available as spares and can be supplied separately due to the reason of damage like you have experienced.
At Kawasaki UK back in the day, these were on the shelf but Lxx denotes the length so may need to be ordered specifically.

The following (although not pictured or mentioned) can supply retractable systems (an ex client of mine purchased one), and can easily be retrofitted.
I'll try and contact my client and see if they have more specific details.
Safety and order with the cable retraction system MTPReel