Hi Stef,
on my Triaxis with TX4 Board there is no big white resistor.
But at the place you show on the photo, there is a place on the board which is labeled with R502.
This is splitted into two resistors with 10k and 2k7, 5Watt. The lesser Ohm value is attached to the point near to the rear of triaxis, the 10k is attached to the point showing to the front. Where the resistors are wired together, there is the white wire from your photo attached. Does this make sense ?
Kind regards
Sigi