Assuming successful attacks (otherwise you will have to improvise and hope for rain), you must now prevent the remaining Allied stack in 3411 from escaping while discouraging any relief attempt.

Break down both Mot hv AA regiments into 1-10 battalions.

Break down the 12-10 Pz XX 10 into supported components.

Setting the Defense Perimeter
5-3-10* Pz III 7	3311	Don't lose this guy!
3-10* PzG III 69	3111	Blocks the coastal road.
3-10* Mot III 86	3410	Add a 1-10 Mot hv AA II
4-6 Inf XX 1	3412	Add a 1-10 Mot hv AA II
2-10 Mot III SV 287	3312	Add the 3-2-8 Pz II 501
2-10 Mot III 10B	3211	Add the 2-1-10 Pz II 190 (Beja)

The motorized units should take possession of the roads as far as possible before occupying their final positions.

Hex 3512 should contain the 2-6 Mar III SM and the 2-6* Inf III 47 if they are available; add a 1-10 Mot hv AA II.

Hex 3511 can have the last 1-10 Mot hv AA II. If you don't want to risk it, leave the hex vacant and add the 1- 10 to 3512; an enemy move into 3511 leads nowhere (but rails can be broken). The Allied player needs air support to attack meaningfully that 1-10. If things have gone your way, you'll be ready for any Allied weather roll on Dec II.

Tunisian Thunder Operational Plan for Kasserine Crisis

Introduction and Axis Initial Phase
Dec I 1942: Axis Movement Phase
Dec I 1942: Axis Combat Phase
Dec I 1942: Axis Exploitation Phase