I've been noodling this problem for a while.

As far as I can tell, the optimum placement of the front attachment point would be close to the stock heater fan switch (on my late 944). Certainly, the dash is not strong enough to support the net. If the net were attached to the dash there, I believe it would buckle would pull into the passenger compartment. I considered removing the heater controls and placing a 3" steel plate behind the dash, and attaching the net to an eye bolt in the plate. Messy, and maybe worthy temporarily, but not a permanent solution.

It seems to me that the best placement is clear though the middle of the heater core, or right below it, to the firewall. This means removing the dash (ugh!) and seriously modifying the large plastic duct assembly. I am not using the heater core (blocked off) but it needs to remain in place per the rules. I would guess that putting a hole through it for safety reasons might be OK, except that this is not a required safety device (although it is recommended).

The only other idea I had is to weld a large metal tow hook type thing to the cage cross bar, that would come up behind the dash. it would be about 5" long, and I suppose be made of 3/16" metal or something.

I'm wondering if anybody else has an elegant solution....???