Lucky sevens

I believe my oil coolers were hooked up wrong. My PDF manual picture is a little hard to read, so help me out. The line coming off the oil filter setup was hooked to the drivers side, or non t-stat side of the cooler, and the t-stat side was returned to the block. This seems wrong to me. Isn't the line coming off the oil filter the high pressure line, and needs to go straight to the t-stat? Otherwise the t-stat is on the cool side of the cooler, and thats no good.