401k Catch-Up Shouldn't Be Matched Using Spillover Method

We will be using the delivered spillover method for 401k catch-up where the same benefit plan code is used to trigger catch-up contributions using the delivered extension process. Therefore, regular 401k and catch-up are both under the same benefit plan code and deduction code.

Question: how can we prevent employer match from happening on the catch-up since we are using the SAME benefit plan code? Employer match rules are at a plan-level, but we have this fork in the road where a benefit plan code matches on regular 401k but shouldn't match on catch-up. Where can we ensure the latter?