Can't you just swap the ODD connectors over? AFAIK, optical drives from the PowerBook G4 and iBook era used a standard "Slim ATAPI" connection.
I did not know that. Though to be fair, in order to properly remove the optical drive from the PowerBook, you need to strip the machine down to the bone.
It also has a newly failed DC-In board, so you'd need to do the same thing to replace it. Neither task I am willing to do for the end result, which will always be a slower, hot running portable in (in my case) poor condition.
In other news... I got the iBook back together and made SURE to test the mSATA's connection before reassembling. But there are problems.
1. The original keyboard bezel had a faulty left speaker, and a non-perfect right speaker connection. The replacement I bought was stated to be in full-working order, and...it still has a faulty left speaker, which means the signal coming from the computer is bad, and I wasted my money. Plus, the "full working order" replacement came with a trackpad that requires you to push farther than the initial "click" to register. The original trackpad did not have this issue.
2. While testing if the machine recognized the mSATA before it was reassembled, the fan would not spin. I'm not sure if this is some kind of precautionary measure (with questionable logic) as a result of one of the bezel's plugs not being seen by the system, but after it was reassembled, Apple Service Diagnostic did confirm the fan functionally works, but I have not heard or felt any air being blown out the back, though I did not put it under any heavy loads yet.
My local AASP fixes PowerPC Macs and has a collection of them (or at least they did 2 years ago) for spare part purposes. I'm going to ask them if they have any 15" PowerBook G4s (what I should have gotten in the first place instead of bothering with this 12" stuff) in the back in exchange for the 2 12" notebooks. They know us, and we've given them a lot of business in the past, so I wouldn't call it unlikely they'll agree. Wish me luck.
But that's a direction for the coming week... I've got a (normal) SSD (Crucial BX500) in a laptop that isn't being used, and I'd like to know how it feels about being in a G5.
Update: It feels great about being in a G5.