Mine was 4 prongs all on 1 joining bolt, two clamp tong things on each side, and compress.
I paid 40 for the POS I got, they must have had a different compressor for sale when you did your springs.
It just never compressed the spring enough, and was in the way of the spring seating on the strut when it was compressed enough.
Glad we know what tools to use and not to use next time, the last two shouldn’t take as long hopefully.