Rear glass and Liftgate interior latch releases, Mk1
Used thicker / stiff wire coat hanger, interior end looped and crimped on suitable parts of the latch mechanism linkages. Pull up on the ring by the glass to release the glass. Pull horizontally towards the driver side to release the entire hatch.
I clamped the other end of the wire (deliberately left long) to the end of a dowel and twisted / wrapped the wire around the dowel, then taped up the resulting wire loops. I intend to find some sort of ready made pull ring molded on to a wire or cable.
Only vehicle modification was a 1/8" hole drilled in the trim plastic, where the top wire passes thru. It MIGHT be possible to use a thicker stiffer metal rod with some intricate bending and make a version of this that passes around the trim and still stands off from the glass.
The Liftgate release wire just passes thru an existing seam between the upper and lower halves of the interior trim plastic. There's a sort of shiplap overlap between the pieces, the wire is between them. It might work better if the underlying piece is trimmed back some. Then again if there's clearance the wire would probably rattle going down the road.
And the height of the middle seam works very well with my drawer platform, it falls about 1-1/2" above it. Immediately to head / hand if sleeping in the back.
I have more pictures of the interior latch mechanisms and attachment points, to follow later.
I'd rather have a more finished and fitted latch mechanism a la a dash-mounted emergency brake release handle. But this works well enough for now.
I might pull the wires tonight and dip the rings in red tool handle dip / liquid electrical tape, let them dry overnight. Or do something silly like stripe them black and yellow like ejection handles.