It depends. (Don't ya hate it when somebody says that?!?!)
The SuperC was made with two types of throwout bearings. One (#17 in the parts book), the kind that required those springs, was made of a graphite compound that was fitted or molded into the carrier so that it was all a single piece. Nothing turned. The clutch fingers rode on and polished the face of the graphite block. This, if you decipher the parts book, was made for a tractor operated on the conventional clutch pedal for operation. The springs you're asking about pulled the carrier back so that the face wouldn't idly bump into the fingers while underway.
The other type (look at 16A and 16C, carrier and bearing, in your parts book) is what most folks are used to thinking of as a throwout bearing -- a roller type bearing with a mount of some sort that lets either the inner and outer sections spin against each other when in contact with the clutch fingers. If this is what you have, there is no provision on the carrier to hook the springs up, as there is no need for them. If the roller bearing floats into the fingers, there's no harm done, unlike the graphite type.
The reference to the Hydra-Creeper in your parts book has to do with IH using that type of bearing with a system that used the hydraulics to move the tractor by a linkage to the lugs on the end of the bull pinions exposed at the end of your brake housings, basically driving the tractor from the gear end instead of the input shaft of the transmission. To use that system, you had to block down the clutch pedal, loading the throwout bearing, and the graphite just wouldn't stand up to that kind of prolonged contact.
If you've got the roller type bearing in there, you're ahead of the game and there's no need for the springs you inquire about. IH abandoned the graphite bearings after a while and only the roller-type is available anymore. But that requires the separate carrier and, having been there, you don't want to buy one of those if you don't have to.
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