Looks like the starter solenoid wire to me too.
That's not the correct placement for those grounds but it'll work fine. They have their own boss where they connect on the intake manifold a little further back where nothing else attaches (that may be it in the picture) and I believe Toyota specifies a special fastener for it (certain alloy with two or three stacked washers pressed on it). There are circumstances where you cannot ground all lined to the same location (for noise reasons) but those are fine.
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