b-series
usdm 90-91 cable: small spline
usdm 92-93 cable and all JDM cable: big spline
usdm & jdm 92-01 hydro: big spline

d-series
88-89 cable: small spline
90-01 cable/hydro: big spline

h/f-series
usdm & jdm 92-01: same