Foundation dimple mat with fabric or without?
Neither your Option #1 nor your Option #2 are ideal.
Note: Mastic on the wall is used to keep moisture OUT of the wall, not the HDPE membrane.
Note: The HDPE membrane is used to provide an air gap at the wall so moisture can drain DOWN the wall. It eliminates hydrostatic pressure so moisture is not forced in through the wall causing a leak.
Your Option #1: Without a filter fabric the system will clog in a short amount of time. (Btw, you didn’t mention having a mastic waterproofing applied first, but I assume you understand it’s required.)
Your Option #2: Installing the HDPE sheet with the dimples away from the wall allows the membrane against the wall and defeats the purpose of the dimples. (With filter fabric applied to the dimple side of HDPE sheet, it will flex to infill the dimples and moisture will create the hydrostatic pressure it’s designed to eliminate.)
Recommended Option: Install the mastic waterproofing on the wall, then install the HDPE sheeting with dimples toward the wall to create an air gap that allows moisture to drain down the wall to the perf pipe, then install the filter fabric to keep soil particles out of the system and extend the longevity, then CAREFULLY backfill with drainrock. (We use a 1” fiberglass board so rocks can’t accidentally puncture the fabric and membrane.)
Likewise we wrap the perf pipe with filter fabric to insure the moisture that drains down the wall reaches the perf pipe and soil does not plug the perf pipe.