How bout a back side photo? (Rotted guts and controller/equipment included)
This is like looking at the wrong side of a .... ahh never mind...
We need the whole enchilada.
If someone showed me this with no explanation, I'd say you had two air control knobs (that control jet pressure), and a circa 1982 design light switch on the bottom with an ancient exit hole for a 1985 or so multifunction controller pad.
Aside from that this is greek. And you ain't gonna find no drawings or schematics for this tub as they don't exist unless you've found klinger hanging out in a hole somewhere with the secret stash... and that wire looking thing sticking up, it looks like I'd want to keep it away from my ear lest it crawl in and invade something up there...
You know what I mean...
