Hi everyone I’ve just dragged my 2002 1150gs from its long sleep it’s been on a trickle charger for 12 months plus. My first attempt at starting it turned over slow but did not fire. fuel pump did not prime so cleaned connector under tank and pump now primes as normal. So second try it’s cranking over but slower. so I jumped it from a car battery it started easy. I let it warm up and it runs normal turned it off and tried to start again without jumping thinking it would now have a bit more charge in battery but cranking to slow to fire up still starts easy with a jump . I have checked it is charging ok battery connections are clean but I cant find where the other end of earth lead is attached to frame or engine I don’t want to pull the loom around to much as it’s all a bit brittle and crispy. Can anyone point me to it’s location? It probably needs new battery as definitely over 4 years old but it shows 12.4V.