Someone has resurrected the Mazda EPC (electronic parts catalogue) as part of a wider multi-marque parts catalogue website.
[url]https://partsouq.com/[/url]
If you right click on the image you want, you get a "screenshot" option and can then capture the entire page AND formally download it.
Unfortunately most of this seems to be for European left-hand drives (unless you can read the Japanese versions), but obviously that's not a problem with all parts.
There are several different catalogues for the BG/BA/BJ, so you might have to search through several to find the variant you need (the V6 is in AEBM03).
I recommend that if you think you might ever need these diagrams, get downloading now before they disappear again!
S