What is the ruling of Islamic law on embedding television cables inside walls during house construction?

The ruling on installing television cables in homes is no different from the ruling on manufacturing and selling televisions themselves, as both are means for either the permissible or the forbidden. There is a significant disagreement among scholars regarding the ruling on selling devices that can be used for both sin and permissible acts:

Shafi'is: They deem it reprehensible to sell something if it is known that the buyer will use it for sin, and forbidden if its use for sin is certain. Hanafis: They permit selling something where the sin does not arise from its intrinsic nature (like juice to a winemaker), but forbid what inherently leads to sin (like weapons to those who cause strife). Malikis: They forbid selling anything if it is known that the buyer intends to use it for an impermissible purpose, in order to block the means to evil. Hanbalis: They hold that selling juice to someone who will turn it into wine is void if the seller knows the buyer's intention.

In conclusion: There is no impediment to installing television cables in homes prepared for sale, because the seller cannot verify the buyer's intention for their use, and obliging the seller to do so would cause hardship for people.