I see service manuals, but i need a parts breakdown for rear suspension 92 indy 500 efi.
Between the two springs there is a remnant of a bar misding the middle highlighted in the bottom two photos, that is what I have concerns withIF you are talking about those bars and the bars that are encircled together those are springs for your suspension. They don't attach to anything. The top part of it sits on this part from the link below.
You see the blocks in that link as well where the top of the spring sits on it, the bottom sits next to the rails.
Kimpex Part # for the left is 04-384-01, Right part # is 04-384 you can get them cheaper on eBay or amazon