Horseshoe clip back on?

If it's a standard "E-ring" clip (looks like a round E letter, fits the outer rim grooves), you just need to push it in place sideways using plyers or a screwdriver.

If it's an outer "O" ring clip (looks like a split ring having a flat surface with a small hole at each end, the holes facing outwards, fits the outer rim grooves), you will need the ring opening plyers tool to hold the ring open (expanded) when you put it place, or you may also use twin plyers or a pair of pointed metal sticks to open it and slide it onto the spindle, then just push it down until it locks into the groove.

There's also an inner "O" ring (has holes facing inwards, fits the inner rim grooves), this needs to be pushed together (contracted) to fit into the rim and released so it will expand into the groove, also requires a specific tool, but can as well be worked with some kind of improvised tool.

Hope i'm talking sense here, but i assume the clip on your aiwa's spindle looks somewhat alike to what i've described, i'm just not sure which type of clip/ring it is (E / outer O / inner O), i suspect it is an E ring as i've seen this kind on other brands.

regards

3rq8 (Triarcuate)

Lay the clip on the turntable with the legs in the groove. Using needle nosed pliers, point them straight down and reach down and squeeze the clip into place.