Can I use the LATCH (UAS) anchors that are not designated for the vehicle seating position I have selected for my Foonf convertible car seat?

No. LATCH (UAS) anchors have a required standard spacing of 11 in. (280 mm) from centre point to centre point. In rear-facing, using the rear-facing LATCH (UAS) belt to connect to lower anchors that are closer together or farther apart than 11 inches will not allow for a secure installation.

In forward-facing, Foonf is designed with a rigid LATCH (UAS) system and will only be able to connect to lower anchors designated for that vehicle seating position.