Loco
LGB,Aristo,USA track are all 332...They will fit together.
Bachmann, Aristo and 99% of engines and rolling stock use this track,
so name brands engines etc. are not a problem.
Connect each piece tightly.
Connect the wire from power pack, one will be + and one will be - to the track.
One goes on each rail( this is were those clamps come in handy).