Alright, I talked to wodka (thanks again!), and he helped me to get it running:
You need no modifications on the client, only the following on the server:
In the “data/equipment/weapon_equip.ini” delete the [CloakingDevice] you want to use (for example cloak_fighter).
Add the following:
[MineDropper]
nickname = cloak_fighter
ids_name = 263165
ids_info = 264165
DA_archetype = equipment\models\weapons\li_cm_dropper01.cmp
material_library = equipment\models\li_equip.mat
HP_child = HPConnect
hit_pts = 400
explosion_resistance = 1.000000
debris_type = debris_normal
parent_impulse = 20
child_impulse = 80
volume = 0.000000
mass = 10
damage_per_fire = 0
power_usage = 0
refire_delay = 1
muzzle_velocity = 20
toughness = 3.300000
projectile_archetype = mine01_mark01_ammo
dry_fire_sound = fire_dry
separation_explosion = sever_debris
lootable = true
LODranges = 0, 20, 60, 100
cloak_fighter you have to change for your needs, of course. It’s simply a copy of the first mine (mine01_mark01).
Maybe this helps more people who have this problem