Where to trim for air suspension? 5th gen, 2001

Recently got bags for my 5th gen, and ive read that with the non slim style bags there is trimming required on the front somewhere around the uca. I threw them in and didnt notice any immediately obvious places that would rub so im just wondering if anyone can give me some more specific information. Closest contact point is where the uca bolts to the chassis. Maxload air suspension if it makes a difference. Thanks.