Unusual A/C configuration, 90 loyale

Here‘s a puzzle I can‘t seem to figure out.

There are three dual-drive (v-) belt configurations I‘ve seen mentioned around the web. The same three are shown here in the 1989 factory service manual: 

The Panasonic A/C setup has an outboard A/C compressor, inboard alternator, and idler pulley below the A/C compressor. The rear belt is the A/C belt, the front belt is the alternator belt.

My Loyale has an outboard A/C compressor as well, but no idler pulley, and someone seems to have switched the belts around. 
I don‘t see any place a missing idler pulley would bolt in, either…

Funny thing is, the A/C belt (without idler pulley) is too loose, even though I‘ve extended its tensioning bracket all the way. Belt doesn’t seem like it has been stretched a bunch. Belt is a Gates 49.5“. 
Wrong belt?

Missing idler pulley? 
Stretched belt?

I‘ll try replacing the belt with a new one since I already have one, to see if it will fit better…

I can‘t wait to get this weirdness sorted out. The properly tensioned alternator belt does the job of keeping everything spinning, but one of them still squeals occasionally. A/C doesn‘t really work anyways, and that‘s not a part of my car I‘ve researched much.

Hoping to resolve this by either deleting the A/C system (I prefer windows anyways) or getting to the bottom of all this. Here are some pics of the belts and the compressor. Not sure if it’s hooked up right, I have yet to check out how the wiring and fluid lines work.

- can I just pull the A/C compressor and disconnect the wires, then run two belts on the alternator? What else will I want to remove?

- what do you think is the deal with this configuration?

please advise!

You can see the A/C, alternator, power steering, crankshaft, oil pump, and nonexistent idler pulleys in counterclockwise order from the top right. The A/C belt is in front, and my new alternator has a single groove pulley (works out!) because I haven‘t gotten around to putting the old alternator‘s two-groove pulley on it. 
(sidetopic: that‘s because the bolt is on there pretty tight and I am having trouble getting the new alternator back out to work on it: the alternator came with a tall lip around the rear pivot bolt hole, and I had to pry the opening it slots into apart slightly to get it in there. Now I haven’t been able to get it back out. Was pretty impressed I managed to get it in there and fit the pivot bolt through everything in the first place! I should have ground down the lip a little so it was more of a snug fit and not a death-grip, jeez. Anyone had this problem with recommended replacement alternators?)

 Another angle for good measure

the A/C compressor

The two connectors coming out of the wiring harness near it; only one connects to the A/C

cheers

jon