Sorry to say this... but yeah, you're missing that piece.
looking in the wheel well you shouldn't be able to see the "insides"... any of it. That includes the bumper's inner skin.
Hmmmm, I don't see where the spherical thing attaches to the expansion tank... I may have missed something. I'll try to trace it.
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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project