Practice the Emergency Release First
Before you ever leave the house with the system, practice unclipping the secondary leash from the primary leash. This is your emergency release.
If something happens on a walk and you need to free your dog fast — a fall, a hazard, a situation where staying tethered isn't safe — you want that motion to be muscle memory, not something you're figuring out for the first time under pressure.
Do it ten times in your living room. Do it with gloves on. Do it without looking. Then you're ready.