remote

Hi, 2015 low seat spec UK (aka only UK spec) Hyperstrada. The rear remote reservoir has a small round knurled knob at the bottom. This knob does rotate, at least on my bike but I'm pretty sure it serves no 'user' purpose. Might be used if the reservoir were to be serviced? Anybody any ideas...

Bought a key chain remote for garage and found a nice place to mount it in grip guard. Just used some industrial velcro and heated up adhesive with blow drier until really gummy. It's very secure, removable and didn't get wet when I rode through storm yesterday. It's tucked in and well hidden...