Hp dv6000, internal wiring wlan card!

Hello, I disassembled my DV6000 in order to use a heat gun for a reflow of the graphic chip. After successfully bringing back the screen to life I started putting it back together. Now I'm stuck with a black and a grey cable that connect with the wireless card. They are soldered together and usually a silver metal tape connects them to the metal frame/chassis right below the keyboard. This piece of tape doesn't stick anymore. I assume it is necessary to establish a connection to the chassis for better wireless performance, or? Is it obligatory to connect to the chassis (safety) or could I just isolate it where it's soldered together so that it won't get in touch with any other component? In general, why do they use such a crappy tape? I can‘t imagine that this a solution for a reliable operation during many years. Better soldering it to the chassis?

 

Sorry I am NOT going to be of much help,hoping these service manual sites help.

http://h10032.www1.hp.com/ctg/Manual/c01035677.pdf
http://www.s-manuals.com/pdf/notebook/hp/hp_pavilion_dv6_maintenance_and_service_guide.pdf

 

Thx, question is rather simple and applies for any laptop brand in general. Look at the picture attached. Hp makes an effort to increase wireless performance here, or? Otherwise they could just keep the isolation of the cables untouched. What's the purpose? I want to fully understand this...