Spring clips, circular? Have holes for a Pliers? or no?
Doing a replacement Brake Booster on my '97 Tahoe once, yeah, real lovely stuff disconnecting down at the Brake Pedal.
They refer to these hardware nightmares as "Jesus Clips", because when you try to remove them, they fly into oblivion never to be found again. Hence the name "Jesus Clips", where did that SOB Clip go?!" I was smart, had new replacements!
You get caught with your pants down with meager layman's tools, the job does become harder.
I had lovely job one day, when getting some repair parts for a very valuable Slingerland Spitfire 12 Lug Snare Drum.
There was needed new short piece of small surgical rubber tubing involved as a tensioner component of the TDR Snare Throw Off Mechanism, and was held by a washer and very small spring clip.
It was difficult. But I succeeded.