It was some kind of trial in the railway... Initially, I renamed the file to oscam.deb and got this message
dpkg -i /tmp/oscam.deb
(Reading database ... 12851 files and directories currently installed.)
Preparing to unpack /tmp/oscam.deb ...
OE2.5 IMAGES: libssl.1.0.2
OE2.5 IMAGES: libcrypto.1.0.2
Unpacking enigma2-plugin-softcams-oscam (11715-emu-r798) over (11715-emu-r798) ...
==================================================
Setting up enigma2-plugin-softcams-oscam (11715-emu-r798) ...
==================================================
:I'm checking your device processor ...
:Your Device IS AARCH64 processor ...
No emu script to this image now .. ask about it :(
-------------------------------------------------------
* Oscam Config & Softcam files in [/etc/tuxbox/config] *
-------------------------------------------------------
*******************************************
* Install Finished
* *
* Need To Restart Enigma2 *
* *
* Patched and compile By MOHAMED_OS *
* *
*******************************************
Unfortunately, I did not appear after this neither the oscam file nor the script that would run oscam.
It doesn't matter anymore, because master G -gave me the current link to install boxpirates cam manager :)