RC 505 meets DRUM MACHINES! How To? Feat DELUGE! Deflectors

What's the best way to connect your drum machines, grooveboxes, etc to Rc 505 looper? ( 202 should be similar. ) Here is my example, using my synthwave song in progress "Deflectors". The machine shown is Synthstrom Deluge, but it could easily be an Electribe or MPC, etc. - the method is the same.