Problems with 2009 Honda Odyssey CHILD SEAT

Safety concern that the manufacture did not address re; e-z on molded # 86y universal harness. my son is 9 and has cerebral palsy he weights 98 lbs and due to his condition he cannot sit on a booster and is large enough to sit in a regular seat. we are using this harness slog with the lap shoulder belt institution along with the locking clip (item g on the owners manual). however the locking clip in the illustration is next to the latch plate. unfortunately, this configuration does not work in our honda odyssey - as well as most other cars the locking clip has to be placed on the opposite side as if you do not the shoulder belt will not be held in a secure position- when i asked them if this position had been crash tested - they told me yes but could provide no documentation. we love the harness but i was to make sure that it is safe for our son. i can send you picture if you like. thanks for your help. [xxx] information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6). *tr (related vehicle information: model year=2009, make=odyssey, model=honda)