Thanks berlinonaut! Tried what you said but still not enough tension. The cable needs to be shorter.

There's a little slot on the cable connector at the dog leg. If you look on the backside of it (behind the grub screw, with wheel off), there's a slot on the back too and you can see your shifter cable threading through. I used a needle to help guide the cable out of that slot, so that the cable can extend beyond the slotted area. Made my adjustments, tested the shifting, and then cut the cable so that it fit inside that slot. This way you don't need to guess how much cable to cut off.


Brompton post-2017 DR cable anchorage spring set