A disco classic with some rock-solid grooves from Jimmy Williams: McFadden & Whitehead - 'Ain't No Stoppin' Us Now' bass transcription pdf
Apart from the high C it should all fit in one 3-fret position - it sounds to me like he plays the line starting on the A string; as long as you jump straight back after the high C and play the Ab with the first finger then everything should fall into place... hopefully!