not the person you were asking, but I Asked a similar question...here was his repsonse.I tried the same in my OT, however the tabs on the KSC350 are too short. The drivers are also too deep and stop them from sitting flush in the space by about 1/4". Do you have any details on how you got them to fit?
Would love to hear your thoughts once you have them installed
The speakers themselves are held in by two 10 mm bolts. The speaker harness releases by pushing a small clip. The replacement speakers didn't fit exactly, but do fit. The mounting depth on the corner dash speakers is about 1.5 inches. I was just able to get the replacement speakers to fit the space. I reused the factory 10 mm bolts/washers. I put a bolt through one of the holes on the speaker bracket. The other hole didn't line up, but the bolt/washer was still able to secure it in place