As a woodworker I have a variety of little squeeze clamps, I used a needle nose set to hold the fuse holders, but I agree the hole is huge and they have to be held somehow until you can solder them in.
For all the fuses and resistors, I also use blue painters tape, about 5 at a time. I'm still trying to find a way that works to keep the SSC pigtails down while I solder them without melting the wire insulation!