I snagged a dbx 266xl rackmount compressor very cheap and wish to use it with my rackmount ABM 500 head. Do I run a cable out of the effects send on the rear of the ABM 500 to the input of ch. 1 on the dbx and then run a cable from the output of ch. 1 of the dbx to the effects return on the ABM 500? There is no other obvious alternative to me, and I would appreciate some help in reducing my ignorance on the use of compressors. I have had amps where the compressor is built in, but never one where it was a separate component. Thanks in advance!