Flatten Harness with assembly items

Many customer want to have a detailed mechanical drawing of a harness sent to production (far away sometimes).

It is not just cabel lengths that are of interest. Any other item attached to the harness could have a similar importance to make the harness fit in a tight product design.

I want to be able to flatten any attached assembly items to the harness. It should be present in the drawings and to dimension it.

Solidworks