I have more than three categories of predictor variables in my binary logistic regression, however, unable to identify which is which for my interpretation.
You will have to rerun the regression using different METHODs to appreciate which variable should contribute to your model or not.
Just below the column for covariate column in SPSS there is a function called METHOD. Try using BACKWARD: LR, FORWARD: LR and a few others. The best method will naturally exclude non-contributing variables in the output.