Re click boxs;
Using the click box requires that a plastic trim is removed by removing a screw. The black mezzo front wheel clip needs removing. Then to secure the front wheel in folding rest front wheel bolt on rearchainstays and secure together. I use a hair bobble around the seatpost and cconnect it to the brake hoodsm really quick simple.
Re sash.
The mezzo front wheel clip must be moved to allow toggle chain clearence. Just use a mending plate to move it about 1" behind I seem to remember.
I believe photos of these in thread earlier.