Historically, on the Con+ system nobody has seemed to ever figure out where Sites 2 / 4 really are, other than them being in NE Indiana or vicinity.
I was sniffing around on
www.erssite.com . They manage some tower sites for other companies. And four of those are in Albion (Noble), Kendallville (Noble), Lagrange (Lagrange) and Orland (Steuben). I'm wondering if Sites 2 and 4 might be on a couple of those towers. Lagrange and Kendallville look like possibilities. Just throwing it out there. Unless they have towers registered under a different FRN than the two FRNs that I know of, either they are leasing tower space predominantly from the big guys (like Crown or someone) or they own towers that aren't tall enough to require FCC registration.
Then again, they also have site licenses in Auburn (DeKalb) - WPTA592 (analog trunked) and WQQL305 (with DMR emissions). And based upon the neighbors that the CON+ sites 2/4 reported in the past, I would suspect that site 2 is up in the Lagrange area and that Site 4 is either in Auburn (given they do have a trunked license for Auburn) or maybe Kendallville.