Which lines coming off master cylinder go to the rear wheels.

If there are 2 thick lines going to the ABS module, then they should be the ones.

What'* the issue?

I have 4 lines coming out of master cylinder all 4 are diff size fittings same size line ,I can see the first top fitting going to driver side wheel then there'* a smaller fitting under that one then the next set is smaller fitting on top with bigger fitting on bottom I'm trying to find out which of the remaining 3 fittings and line run to the rear wherls,mt 92 olds has pads in the front and drums in the back

Drums take the smaller reservoir because they have the small pistons.