Where is the mid-roof AC drain?

[CaptPat]

I've found the drain lines for the front AC (in front of LF tire) and the rear AC (behind and under the battery disconnect box RR of MH), but can't find the drain for the mid-roof AC. Anyone have any ideas or locating information?

On a related note the mid and rear ACs are not draining through their drain lines. I've tried blowing the line for the rear with air, and the cup under the AC unit on the roof bubbles over, but it still isn't draining freely. My guess is the line is kinked somewhere, any other thoughts?

I've thought about blowing the mid roof drain line from inside the coach but it is nearly impossible to disconnect the drain line inside the coach.

My AC units are Dometic 630035.331 and 630515.331.

Thanks in advance

Pat

[Twomed]

On our Dy the middle drain is pass side about 3' forward of rear axle. Depends on where you are on how much water you see. Low humidity place will yield very little water at drains.